It's one big difference between Boston/Cambridge and some other places like the Bay Area. You can get away from some of tthe really high real estate prices relatively quickly and a lot of the tech jobs aren't even in the city anyway.
There's not much to be gained by living in Fitchburg. The real benefit is that a commute from somewhere rural to a train station in Fitchburg (or the "end of the line" for some other city train system) is painless.
I guess it's just a function of overall population but it's nonetheless interesting that while Boston/Cambridge have indeed gotten very expensive, there's a lot of pretty reasonably-priced housing not all that far out.
I don't know. I work with someone who recently sold their house in Leominster (next to Fitchburg for those not from the area). He said there had been very little appreciation over a long timeline.
ADDED: The problem when these old small New England manufacturing cities gentrify is that you end up with a dozen square blocks of upscale and the rest is like it's been for decades. I worked in downtown Nashua for a long time and it was like that. Which, for me, makes it get boring quickly.
California is messing up the HSR project by not getting SF to Gilroy and LA to San Diego completed first. Sacramento to Nowhere is a PR blunder for the state.
https://www.paloaltoonline.com/news/2015/10/14/palo-alto-bla...
http://www.smdailyjournal.com/news/local/high-speed-rail-met...
I'm not sure CA could do SF to Oakland by HSR in a decade.
https://en.m.wikipedia.org/wiki/Silicon_Valley_BART_extensio...