Well... Here we are at the gates of the new algorithm, and nothing has changed. I spent basically an entire year getting into the most excruciating details of our code, getting everything out of the way and got to a performance score of 100.
The moment I drop the GPT tag and ad units into place, the TBT goes up to 20s and the performance score drops to 50.
On top of that, there's no new docs on GPT pointing to any changes that could help with this, not even on how to get it working with some third party solution like Partytown.js.
So... After a year of hard work doing EVERYTHING that Google told us to do with our code, All we're left with is frustration and fear that our websites are going to fall off the indexes and Google have spoke nothing on any sort of solution to that.