Re: 10,000+ techniques
At any rate, IMO, trying to account for and practice every conceivable aikido technique is not a great way to try to understand it.
Put another way, I think aikido has a fair number of "different" techniques -- maybe a dozen, maybe twenty. Aikido in general, anyway. My aikido has maybe two or three -- that is, there are maybe two or three techniques that I'm getting decent at applying with a sincere, active partner.
A boxer has only a few techniques as far as punches go. But they're quite formidable, because they're A) very good techniques and B) practiced exhaustively in challenging settings.