We need to compare solar and wind to these SMRs with the desired output characteristics. How acceptable is dropping the output for 10 hours each night, and lose 50% of your max output during long periods? If that's ok for your application, Solar without storage is probably the perfect solution. If you 99.99 of your time to be at a certain output level, all year round, solar is going to require overbuilding, and a weeks worth of storage (which changes the costs per MWh considerably).
Likewise, if you need a lot of heat for your application, solar is not going to be as good as an SMR.
The best technology is most likely going to be different depending on the use case. SMR would operate in a decently sized niche in our current world. What is not clear to me is how big this niche is, and how quickly it will shrink as gridescale storage tech becomes more economical.