Figures wise, a typical route currently is 25km with 550/600m (1800ft) climbing.
My last “big ride” was the CVMBC, topped out at 47km with 1350m of climbing. So a “SL” may have struggled to see me round that on boost, but perhaps a gentle assist would have been enough just to help? I don’t want to be Surroning around trails. Mate did it on his Rise with the rangey and was fresh at the end with plenty of battery.
I’ve a Kenevo SL, it’ll do your ‘long’ ride on just the internal battery – with plenty of spare and TBH it’d cover your typical route in Turbo no trouble.
From my experience of 2 years with the KSL, I can recommend it and Specialized (for warranty work).