My world is playable now after it broke with the 1.17.30 update. Now with the 1.17.41 I’ve noticed that it’s not as smooth as before. There are lag spikes when I haven’t experienced them before, gravity blocks don’t fall smoothly anymore, and (I didn’t record the third one) sometimes when I’m breaking blocks there’s a 2-3 sec delay with the animation. Sometimes the blocks reappear. I’m really happy to be playing in my world again but I did want to also note things that are happening that wasn’t happening before these last few updates. 
Note: I did search for this bug but didn’t find any with issues specific to the lag and gravity blocks for worlds that had been previously broken by 1.17.30 and fixed with 1.17.41