I’d like to think that alone doesn’t instantaneously kill a product for its users as long as they are are satisfied with its current functionality.

I know some platforms like Apple choose to rush all its users and developers through a compatibility extinction event every decade, with smaller breaking API changes happening even more often.

But many pieces of i386 Windows software 25 years old still work fine today, as long as it isn’t dependent on a cloud backend. So OP could have 25 more years of it working fine, or it could be worst case Mac software which will die in a year or so when Apple pulls the plug on Intel and demands native ARM only.