The fact that the change is “sudden” is a direct result of the fact that the ability to build has been restricted for so long. If building densely had been allowed all along, things would get built out whenever it made financial sense to do so, and you’d be able to see the trend coming gradually from a mile away. But now you’ve got all these low-density areas right next to (or in!) cities that have had artificial limitations on building for so long that when you do upzone a part of it it’s like letting out pressure all at once. The demand has grown with the population all this time but it hasn’t been met.
It’s more important to me that people have places to live than that existing homeowners everywhere can have a neighborhood that never changes. The two are incompatible. It would be preferable for that change to be gradual, but given the current state of things I don’t see how that’s possible.
The public transit infrastructure will make a huge difference, in my opinion. The light rail heading north into suburbs where there's tons of space to build will make living outside the city itself much more bearable for people who work in the city. A modest single family home may still cost $1.5 million in the city, but at least people will have better options that don't mean a two hour commute.
It’s more important to me that people have places to live than that existing homeowners everywhere can have a neighborhood that never changes. The two are incompatible. It would be preferable for that change to be gradual, but given the current state of things I don’t see how that’s possible.