Something like ~30% of desktop users use ad-block.

If you are tech or tech-adjacent content, it can double or triple that.

40-50% of desktop users on my channel, heh.

I don't hold it against anyone. YouTube's ads are horrible, and overstuffed into videos.

I use premium and know not everyone can afford it, but one concern I have is premium views are also not counted if someone still uses the adblocker while logged into YouTube premium. (So you miss out on the view and on that extra bit of premium revenue).