TTRE is a good solution
I had an XT in the '90s
and now own a TT600RE.
they are very similar bikes, both have e-start, but the TTRE is more agile in the traffic, more versatile, good for traveling (luggage systems) and better off-road.
it is also a bit taller, lighter, slightly simpler, with more spartan look.
the shock on the TT600RE could be better (especially if compared to the gas ohlins shock of the TTR, kick-start), but not sure in comparison with the XT600e which one is best, if the TTRE or the XTe one.
many people who own the TTRE (me included) upgrade shock and forks to the TTR ones, which are longer, fully adjustable and better off-road.
if I had to do the choice again, now, after one year of TTRE riding for commuting and touring europe, i would definitely go for it again.