I would recommend emailing Ableton directly rather than asking here if you’re concerned, but I would be pretty surprised if Ableton made Max for Live exclusive to Suite owners.
M4L licenses work in the same way as licenses for Operator, Collision, Sampler, etc: they’re included in Suite, but if you buy them as individual Packs then you can continue to use them after upgrading to future versions of Live.
I bought Max for Live on its own back when I had Live 8 Standard: when I upgraded to Live 9 Standard, Max for Live continued to work in exactly the same way as before. The same was true for Operator, which I also purchased standalone. If I’ve understood you correctly, you’re trying to do exactly the same thing from 9 to 10, right?
As I say, I’d probably just email Ableton for an answer but I reckon you’ll be fine.