and it did - for those technologies that became cheaper as a result. For other things that tech didn't increase the supply of, you end up paying more.

If you did not have inflation - or had deflation even, like in the case of bitcoin - everything would "become cheaper", but it would make certain types of goods/services scarcer (since they'd be paid less and less for doing the same labour due to the deflation, and so would choose to stop doing it at some point).