I've moved up and up. 28's tubeless on the road bike. 700x41c or 650bx2.1" on the gravel bike. Even mtbers are racing on fatter tires now a days. Used to be 2.1's were the end all be all for xc racing. 2.35 is coming around.
My front tri spoke I used for TT's has a 19c on it for aero. Thing scared me looking down at it after all this time riding fat tires hahaha