Better take those rosy glasses off, Mike On the Tandy 1000 128k of memory was standard, with the computer accepting up to 640k of total memory with the addition of expansion cards

Actually, until the short lived Z-series Akai's, 32MB was as much as any of those hugely successful samplers could be expanded to. People would have a rack of the damn things, just to have multiple sounds instantly available. While 64MB doesn't seem like a whole lot by today's standard, it is still twice as much as most Akai's, and capable of doing some seriously good stuff to your tracks. While Tyros can go up to 512MB, it takes FAR too long to load up to practically use it. And you don't even want to KNOW how long it takes to save it!

Personally, if sampling RAM is your most important consideration (mine would be Akai compatibility and ease of editing), I would suggest a Muse Receptor and Kontakt. Or an MS...
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An arranger is just a tool. What matters is what you build with it..!