If it happens then you can come back here and tell me I was wrong.
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Don't wait for it. If 21m is lifted (by adding more fixed block subsidies etc) I'll likely quit Bitcoin altogether (incl this forum) and jump on to something else.
I never said it will happen, just pointing out the possibility.
ps. Where do you stand on concept of 'millisatoshis' (aka adding 3 more decimals to increase divisibility) discussed a bit here? It's essentially lifting the hard cap by x1000 of base units (satoshis) and redefining the number of base units per 1 bitcoin. Still a "Bitcoin" or an altcoin?
The technical issues of changing the resolution would be tricky.