As someone who has owned eBikes, they have really cracked down on enforcement in Southern California.
"No eBike allowed" signs have literally been posted at all the trailheads, so the excuse, "Oh, I didn't know they are banned!" Won't work anymore.
Long before the signs were implemented, I have had personally had rangers track me down and tell me to leave the park.
I know in other countries or regions, e-MTB's are welcomed and embraced. I guess these regions could care less about Strava times.
Anyway, I had a 1st gen Levo FSR Comp and currently have a 2nd gen Levo Comp Carbon FSR. The latest, Turbo Levo Comp SL, literally looks like a regular MTB
https://www.specialized.com/us/en/turbo-levo-sl
Not sure what you're looking to invest, but the newest Levo is worth a look.
I totally agree, an e-MTB allow's riders to cover a lot of trail, whilst having a great time with each ride. And to add, if you run the motor at a lower assist, you can still manage a great workout. I run my Levo @ 15% power assist. Keep in mind, the motor is capable of generating 400% rider assist.