Not exactly, freely available solutions are already good enough for people who just want to run their apps on modern hardware, and have been for a long time. What I was thinking about writing is a tool that eases migration by using interrupt and I/O hooks to detect common patterns and, say, builds a modern SQLite database as the business uses their dBase program. Whether anyone actually needs this, I don't know.

There's a few car dealerships that still use databases from the 80s. As for why they haven't migrated, I'd guess must be reasons I'd assume at this point it's a choice they have made