I did HV last year, and stopped midway through the build. During sweet spot base I found I just needed to make sure that I was eating lots of carbs. Weekend breakfast would be something like a box of Ego waffles (6 of those bad boys), then made sure I was drinking maybe 3 20oz bottles of gatorade on the bike, and then an EFS Ultragen shake after the workout.
I found that I felt great throughout SSB doing that, but the hard thing to me was there was nothing that went above SS during the HV base, so when the build started I couldn’t do the intervals that were above 100%, especially with how long they wanted them to be. After about 6 weeks of the build and feeling worse I went back to individualized coaching.
Had I not done that it would have probably been okay for me to mid volume and just add volume to keep the hours up. Build or speciality would have been too hard for me to complete but SSB was totally fine.