much of the software I use regularly is not Linux compatible. Infothek scanning software; MP3 Tag Studio; Excel; IMSI Turbo FloorPlan; Nero; emplode; Rio Music Manager; Rosetta Stone; Total Recorder; Tunebite; ZDoom; these are just a few of the programs I would have to do without or purchase Linux-capable replacements and go through the learning curve of changed operation.
- Scanning just works without fuss on Linux, and even more so if you take care to purchase HP equipment.
- There are tons of MP3 tagging utilities, and they're no harder to learn/use than any others.
- Excel is just another spreadsheet, like kcalc or OO. Nothing special there, other than the price.
- Floorplan is probably good -- run it on windows inside kvm if you really need it.
- Nero is totally inferior to k3b on Linux. Learning to use k3b takes about 10 seconds or less.
- emplode -- use Jemplode instead, or again run it inside kvm.
- Rosetta Stone works perfectly fine on Linux -- SWMBO used it to learn Italian last year.
- Things like Total Recorder are simply unnecessary on Linux.
- Dunno about the other two.
- Really. "Learning Linux", *especially* for somebody like you, is a non-issue. And the apps don't cost anything, and are totally legal to use and pass along.
But, hey,
you are the retiree.. spend your fixed income how you like -- or not at all with Linux.

Cheers