Furthest I’ve got out of a charge on teal MTB terrain is about 70km on eco. Full fat trek rail.
Removable battery is important to me, even though I tend to charge with the battery on the bike when at home.
When I bought my trek, this wasn’t a consideration, but now I own the bike I think it’s a key feature.
It is very useful when staying elsewhere when I might not be able to get power to the bike (e.g. b&b)
Also the battery takes the bike over the weight limit for my bike rack, removable battery helped out when I had a battery failure (got one on loan from the shop while waiting for warranty)
Or I could buy another battery to give me more uplift time on a big day out.