I'm a lifelong resident, but I can't say I share your optimism. the per capita murder rate is still well above the worst years in the 90s, with 2019 setting an all time high. the population is still falling, rapidly in poorer neighborhoods but offset somewhat by growth in the wealthier ones. our current mayor has not been convicted of any crimes committed while in office (a low bar in other cities), but otherwise does not seem far from the standard fare. at least one key employer (t rowe) is hedging its bet with new offices outside the city limits. what exactly are you seeing improve? I guess it's a great time to sell property in the white L or be employed by the johns hopkins medical system, but other than that, I'm not seeing it.
My optimism is based on the consistent development in the L and it's expansion outwards. Hopkins medical will soon be connected to harbor east with the Perkins development. Station north continues to fill out. There's also been lots of development in federal hill and locust point.
The murder rate is indeed ridiculously high, but I think it will subside as more development happens in the city as there will be more opportunity available.
you're right about t rowe, I confused the story about them moving their main office (to harbor east) with the fact they've opened an office in owings mills. apparently the reason for the move is safety concerns downtown, which is still not a great look for the city, but whatever.
I'm not entirely sure how to feel about the expansion of the L. it's definitely good if you already live there (I do) and plan to stay (I hope to), and some of the areas being annexed are/were fairly close to hell on earth. it's not clear to me that the butterfly residents will benefit from the increased opportunities like you suggest; I think it's more likely they get gradually pushed out to less desirable parts of the county. but we'll see, and I'd rather be wrong!
Gentrification is too broad of a word to mean anything. Baltimore has a glut of housing due to the massive population drop caused by white flight in the 70s.