The question about documentation is a very good one, and SLAA664 plus SLAU591A, available from their download page, does indeed seem a bit meager, documentation-wise. SLAA534, linked from them, seem to contain interesting reading material for an evening or two, and SLAU132J should keep me busy for the rest of the week. Is there anything else a beginner in this field should read up on? I often find statements such as "no biggie, just tweak the interrupts, and it works", which does sound encouraging. I'll just have to learn the old and new interrupt syntax, and I'm good to go.
Is there anything in particular you should keep in mind when converting makefiles and such? Like "sumthin-elf looks like it's compatible with the mspgcc sumthin, but watch out for the -z flag, it deletes your source in the new environment, while giving it an oil bath in the old".
I'm a Fedora type of guy, and the last Fedora with a working mspgcc chain seem to be 20 ( https://bugzilla.redhat.com/show_bug.cgi?id=1175942), otherwise I'd try that to get up to speed before jumping on the new chain.