this is mostly US's problems though. with all the taxes and limitations and all that, merchants think twice before going near bitcoin. and on top of it i hear they are not happy about things like bitliscence.
in other countries things are much better. i think everyone knows about Japan and no tax on bitcoin now! i hear European countries are also doing some good stuff. Switzerland has been bitcoin friendly for a long time now...
Europe is not much better. At least in Germany and Austria there never was double-taxation on using Bitcoin as a currency to begin with, yet I know only few online stores that accept Bitcoin and even fewer brick and mortar stores that do so. In Vienna you can buy Bitcoins pretty much around every corner, yet there's nowhere to spent them :X
In general taxation on long term hodlers is A+++ though, would hodl again.
Steam has been accepting BTC since 2016 which is quite some time after the bubble(s) of 2013 which where the main focus of my original post. I agree with your sentiment that overall merchant adoption has stayed about the same (we lost some, we gained some), but don't expect more merchants to jump in just because the price has risen. Merchants care about adoption, not Bitcoin price. Growth brings new people in, thus raising adoption, but it will still take a while for merchants to react.