You want to build a product? Great, here's the list of what you can't get this week. It's different from last week, next week will be different too. Good luck!
Parts that used to cost $0.50 are now $5+ (various ADCs and DACs come to mind as one I've been dealing with). God help you if you want trailer axles. Etc.
There's only so much you can do with flexibility and "Redesign every few weeks for what's available for this batch" before your design costs and parts cost increases chew up all the available profits, even if you've designed for flexibility. "We can use any uC in this entire line!" "That line is on 54 week lead time. Yes, all the variants."
Such is life in the decline.