How bad would replacing threshold workouts with sweet spot be for my FTP?

[Pbase]

I’m a little worried you’re joking, but just in case, here it is. The implied question being “how are you identifying your ftp?”, because if it’s THAT hard to do an FTP workout, it’s probably not your FTP.

Kolie Moore's FTP test protocol

I’ve seen some mention of this in some other threads, but I’m wondering who here as done one of Kolie Moore’s FTP test protocols, and how it worked for them. I’m thinking of giving one a try and wanted to gather other’s experiences and how they constructed a workout based on his descriptions. In particular, what would be a ‘gradual’ increase in power for the baseline and progression 1, which is what I would be experimenting with.