imho...
Silvercans were the way to go when the alternative were high maintenance brushed motors.
What we have now with BL, and lipo, 20-30 min runs, over and over and over again, with no loss in power, no maintenance.
Just seems BL is the way to go, I guess it just takes time for everyone to agree on how to do it.
21.5 is working very well in So Cal, both corked and uncorked
no timing or boost 21.5 = same speed as Silvercan, but without the slowing due to heat.
I would not want to run an F1 car any slower than that, at some tracks we run the 21.5 with boost, full boost is more than my ability can handle, but that's what makes an F1 car fun, mini is a better spec class than F1.