A major barrier to fixing the problems in the HOME ROM is one of access. Even though the ROM is socketed, you still have to open up the case and risk damage.
This article shows how to replace the HOME ROM without touching a screw. It is not really necessary to replace ROM with EPROM. A battery backed-up static RAM would do as well if equipped with a READ ONLY switch. That way, the RAM can be written and then be switched to write-protect state. The saving in time over EPROM burning is very impressive. Of course, you will use EPROM in the end.