Log as many sensors as you want, to 12.5ns, pretty much forever, for the cost of an SD card.
Since the prop has 8 CPU cores, it can do many things at once, independant of each other, without interupts. Also each CPU core has 2 timers, and an A side and a B side, so a clever guy can (and did) make some neat stuff for us.
any Propeller chip in a working circuit. If it boots, it will work.