Its not even really escalating. Nothing done in the anime really approaches what Doma or Muzan accomplish in the last arc yet. Gaps between respective Hashira and the Upper 6 and Muzan aren't particularly substantial either. Gyomei and Tengen are close to peers (despite fighting the Upper 1st and Upper 6 respectively). You might argue the mark shit makes a substantial difference, but you have a markless Tanjiro impaling Akaza by throwing his sword during Mugen Train and he's only around the lower middle end of Hashira in terms of strength during the Entertainment District Arc (because the author pulled a Togashi and ranked their physical strength via arm wrestling).So the anime is really escalating the powerlevels then? Cause I heard that Tengen V Gyutaro wasn't actually something that happened in the manga.
The Entertainment district is wrecked as is the village in the next arc, but the means by which its accomplished is hard to glean as its a fucking mess to see the full extent of the collateral + the fact they're Taisho era wooden dwellings + we don't know the extent of damage caused per attack beyond some underwhelming results fully shown on panel.
They dodge a few sound based attacks in a few arcs and you can arguably make something from the fact a demon in the next arc can emit electrostatic discharge. Think Muzan and Tanjirou also possess some kind of biological EMP type attack too. Not sure if anything was derivable from much outside the sound based shit though.I'm not even sure where their actual speed feats really come from.