I'd like to see a review of the top three solid tires. I do not believe that any solid tire can perform as good as a basic pneumatic tire, but...I also think there are a few places where their benefits might outweigh the drawbacks. If full-suspension, I "think" that would soften any "feel" issues with the solid tire.
Solid tires are known to be impossible to balance "enough" that they run smooth at high RPMs, so that leaves out a high speed hot rod street ebike. If we limit ourselves to low speed, then the place where they should advertise (IMHO) is off-road ebikes with a rear hubmotor. Rear hubs are hanging on for certain demographics (Australia, etc), and with the weight hanging out at the rear of the bike, I believe they work best with a full suspension frame, since hardtails with a heavy rear hub often have spoke breakage problems.
Front tires rarely have a problem with flats (it can happen, but rear tires are the worst offenders, especially with a heavy rear hub). A full-suspension mid drive is a configuration where I would suspect will not need a solid rear tire badly enough for it to be a popular option, but...
Rear tire, heavy rear hub, low speed, full suspension off-road...in this case, I would not hesitate to risk the price of trying out this solid tire.