I don't really know anymore. I've been playing this for 4 years (including MM of course) and i'd like to say that its because of the community but tbh right now, the community is at its worst point in history. It's practically dead, the only community that you can find in NW if you're not on the forums is within your regiment really. I like to blame it on the fact that NW was more focused on being a commercial game. Melee in MM was better as their was a much bigger skill cap (and an up-stun, jump-crouch-stab and OMGPLSCOMEBACK), ofc for commercial reasons the skill cap in NW was gradually being reduced for newbie players from what was in MM alongside the upstab. This was the early phase of NW, when it was popular and still new. Then came the middle phase, which was the era for trolls. After that beautiful era, the community kept on going downhill until here we are (again, i took a break at one point so thats as far as i know). Most active people using the forums just meme and occasionally some more experienced players look to the past, its a really active and productive forum.
I used to be burnt out with the game so i took a break (in which nr.24, 14e, 17e became popular, probably because i wasnt recking them with artillery so they had a chance to practice melee
). When i came back, i started playing as infantry and a year later, today, i still actually enjoy melee and i enjoy improving my melee skills and playing competitively. Sadly, the only visible hope for both a bigger, more active community with a good competitive side is bannerlord.