I agree that if Intel pull off their process they will have a technology -- and presumably products -- that are technically competitive (performance/power consumption) with AMD, for the first time in several years.
With SRF that already seems to have happened. Of course N3 Turin-Dense will win back perf/watt when it eventually comes out, but the shot has been fired so to speak.
The problem is that if Intel foundry can't compete on price with TSMC -- which seems impossible, not just "challenging" -- they'll be making less money on each HPC/server CPU sold than AMD. So either the product group accepts this or they squeeze the foundry down on price, which means the foundry makes less money, which makes it harder for them to invest in process technology to keep up with TSMC...
It's easy to say "Intel wafer costs must come down" but how can they possibly compete with TSMC who have lower cost and
It's not realistic to say that IF can operate with low wafer margins to help the product group make more money on selling CPUs, because the foundry is now a separate business and has to make enough profit to be able in invest in new technologies and fabs to keep up with TSMC.
If Intel use IF to make CPUs to compete with AMD using TSMC, there's simply less profit to share out inside Intel -- no matter which division gets it. foundry or product -- to develop new products and technologies.
How is IF going to get better if they can just charge BUs cost+some amount to have TSMC margins? If they continue to do pricing based on PPA vs TSMC with a small undercut that forces IF to focus on cost to improve their P&L and gives insight into what they need to improve. Also are we going to pretend TSMC is the only foundry on planet earth? Not even intel says they plan to have better margins or revenue than TSMC. Their 2030 end state is how ever much internal business and more external business than Samsung internal+external plus 40% GM 30% op. Those sort of margin values are in the GF/UMC regime. I don't see why doing that is completely out of the question?
As for how you go about achieving that profitability intel told us:
1) Have technology leadership so you can charge more than TSMC wafers.
2) IDM1.0 was not focused on cost due to the final product being high ASP chips rather than the wafers. The focus was on technology, yield, volume, and minimizing TTM. Now that they are standalone they must be cost conscious and be efficient.
3) Have process flows with competitive structural cost for their density.
1 is what 5N4Y is for. 2 is a mindset change, but folks like GF figured it out so it can't be impossible. 3 is just using the best equipment for the job rather than trying to reuse ancient tools for your new process and have alternatives when something doesn't work (eg 14A being able to easily switch off of high-NA if it doesn't work).
That is only a recent trend. While TSMC total capacity vs intel total is in TSMC's favor. The nodes intel runs are at higher capacity than TSMC. For example intel has/had more capacity for intel 7 than TSMC N5 family. The older nodes were even more in favor of TSMC. Given the use of disag intel's demand for the latest node will always be less than it was, so intel will need external to take their economics of scale lead back from TSMC. If intel products can come back that maybe sounds do-able (but more likely they will only close the gap). The only wrench is if mobile AP folks ever go to chiplets. If they do TSMC's most advanced node at any time will see lower demand (as the demand shifts to older nodes). In that situation intel taking scale back at leading nodes seems much more do-able.
They could, but as a smaller volume foundry with lower profits than TSMC they'd then be unable to invest enough in developing the next-generation process.
By this logic TSMC would have never gotten anywhere near Samsung and intel due to both firms being wildly larger/more profitable until only recently (in the grand scheme of things anyways). As long as IF op margin is positive intel investing in process and building fabs generates profit for the wider intel corp wile also paying for itself (ie it is self sustaining). So I don't see why intel would need to throw in the towel if TSMC has even 1% better margins. All that matters is if intel has the scale to amortize TD/ramp costs. If they can do that there is no reason not to push forward. The root of the reason folks like GF and TI stopped is because the TD/ramp costs grew large enough that at their volumes moving forward would be unprofitable not because they were less profitable than TSMC.