You'd be amazed at how fast carrier boards with FPGAs on them can be made to solder down to existing sized pads to replace a no-longer-available part when a man

You'd be amazed at how fast carrier boards with FPGAs on them can be made to solder down to existing sized pads to replace a no-longer-available part when a manufacturing line is shutdown due to parts availability. I wouldn't discount that Renesas has already been selling these FPGAs for exactly this purpose and mass production using them has already been happening for months. Often big customers get access to parts long before they're public knowledge. Renesas has a whole bunch of automotive customers already for other product lines.