Makes me wonder if I should convert to neuro.

I think you probably should. There's no real upside to preserving your body as you say, and there's a very real cost. (What's Alcor's differential? IIRC, it was many thousands of dollars.)

You could direct the excess money somewhere else, like your family (presumably ALS will have a big economic impact on them - treatment expenses, reduced earnings, etc. - even if you live out a natural lifespan). Or you could donate it straight to Alcor: I'm sure they have better things to do with say $20,000 than spend it on freezing some meat that doesn't need freezing.