Anyone here use an EMTB as a training rig?
I am thinking it could be a great alternative to riding my gravel bike. Ride fast on the road going out to the trails (I’m probably 45-60min away on bike), hit the trails and get some dirt practice, then ride fast on the road going home. Pretty much the same use case as my gravel bike but shorter range, with the trade-off being it’s capable of hitting gnar ngar…
wow, crickets 
To be honest I wouldn’t. See the longer time necessary with your mtb to get to the trail as bonus z2 time, which is never bad but if you have a lot of money to spend…
Yup, works great for that. The road riding part is great for the extra training. No matter how fast you’re going, you’ll want to go just a little faster, keeping you in Z2 rather than drifting down into Z1.
Something like the Levo SL is a great option.
Remember that they are speed limited. In Europe to 25kmh. While that doesn’t matter uphill it easily makes a flat road section everything but fast.