If your 110V wiring is vintage 1910, you should consider rewiring anyway. I was involved in renovating a 1923 building, and the old wiring was neat, but terrifying. Pulled it all out, didn't even want to think about anyone trying to run power through it.
Yeah, we've already upgraded the electric. Definitely could have rerun ethernet then, but did not want to deal with moving any outlets. (Or, really, thinking about the problem hard. We have barely 1000 sq ft, so not hard to cover with wifi.)
