Wondering what you guys think about moving onto the Build phase with no races or events in the spring/summer?
Feel like I could just extend my SS HV Base plan so all over December, January and February i stick to the 2 hour/ Hour and half SS workouts on TR
That’s what I’m gonna do this year (my year is starting a little later than yours, second week of Jan). I’ll do one or two cycles of SSB before moving on only when I have a clear picture of which events will/will not happen in summer/fall. I usually respond pretty well to SSB, so I’m hoping it works in my favor.
I’m proceeding as if there will be racing in the summer 2021. IF there isn’t I can scale back or change the training (probably will not – just to gain the experience) to suit another summer of mostly solo riding but if I don’t train for racing and there is racing, I’ll be behind and I’m behind enough as it is.
I started in September with trad base mid volume and am early in Sweet Spot base low volume, block 1. I figure I’ll be done with the build plan as (if) racing starts in the spring.
However, I don’t think you can go too wrong by repeating Sweet Spot.
Yeah done the first block of HV SS and my fitness best it’s been ever at the moment from looking at my fitness fatigue and form data so feel like just sticking to it will have a positive impact 
I just finished sweet spot base mid volume, and added a bunch of stuff to it too, so in a similar thought of mind I figured I’ll do sweet spot base high volume and see how that goes for me, see if I can keep improving the massive aerobic base, then when it comes time to start a build plan in the spring to spank my local buddies, I’ll have that much more of a platform to do it from, since we’re likely not seeing much as far as actual races goes 
I think a mix of SS / and build its the way to go (also what plan builder suggests). Build is when you really put in the work and should see bigger improvements. Once it is clear when racing starts you can throw in a specialty block, which also reduces load somewhat.
I’m getting to the end of Short power build, ready for a A race ,cx nat champs in march. That has been cancelled, but some local races will be on . Sadly ,my legs have peaked already, had a very good race last weekend, but are finally saying they need a break. So rather than do the cx speciality plan, I am going to do SS1LV incorporating some outdoor rides, and sprinkle in a high intensity once/week.
My only concern is, as an older athlete, I may need more than one/week . I do weights 3x/week and running 2-3x/week now until the MTB season starts. I’m very thankful I use TR, because you don’t have to suffer the dreadful weather we’ve been having. O to live in California, where the sun always shines 