DMSMS -- "Diminishing Manufacturing Sources and Material Shortages". This is how many manufacturers get news of part changes and obsolescence.
When a manufacturer (e.g. Intel) discontinues a part - they are requested to post Last Time Buy & discontinuation notices as well as any Product Change Notifications (PCN). These are posted to
www.Gidep.org. Most companies comply to posting this information but I got burned by Broadcom a couple years back. We didn't get their notification of the pending doom of their PEX8311 PCIe controllers until it was too late.
I have always been a Xilinx person for FPGAs.
For my own use - I may look into the Max 10 dev board. Their smaller parts are dirt cheap and have a fair amount of logic in them, not a huge price jump to the larger versions. I might take my 6532 VHDL code and see how it works out with them.