The problem with 10nm is that Intel tossed most plans to upgrade fabs to 10nm when it decided to fast-track 7nm after it became clear that it would not achieve its original performance and yield targets for 10nm until 10nm++, so there isn't much current nor planned 10nm fab capacity to go around.So Intel's 7nm production is delayed for 6-months for some parts (albeit not all as Ponte Vecchio is still on track). I don’t really see a problem. Because if they manage to finally get good yields on 10nm they should have no problem remaining competitive.
The only way that spending more money on 10nm now would make sense when 7nm is expected to go into production before any new 10nm fab projects could come online is if 7nm went horribly wrong and internally expected to be delayed by multiple years just like 10nm was.
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