Yes, like the OP mentioned, I too had a room treatment revelation that led me to shelve my subs. Nothing wring with subs...it’s just that bass gets so clean, clear and deep when acoustics are dialed in that you actually are no longer worried about bass so much. A sub would always add that extra bit...but you completely stop worrying about it when everything sounds so good. There are other things you start worrying about.
The great thing is that I simply reconfigured furniture and my rack location. Then I got rid of all slick, shiny and glazed surfaces from the room. No specialized acoustic products were used. I had no clue how deep dual 5" woofers could go.