No one is really sure what is going to happen next for this sort of traditional CBD. I know that we are seriously wondering if we need to actually go back to a standard five day a week Downtown commute, which even with a relatively short commute really sucks up time (including just getting dressed and such), makes it harder to handle non-work stuff that comes up during the day, and so on.
I personally suspect the key is to rapidly evolve Downtown into a more and more desirable residential neighborhood, even for people who don't necessarily work Downtown (although it could be ideal for the sort of person who only needs to come into the office for occasional group meetings and other in-person tasks). Fortunately there are still more residential units in the pipeline, and plenty of opportunities to add many more (not least if you include the Lower Hill site).
And of course tourism too. Downtown remains a great base for visitors. Add a growing residential base that supports more and more of an evening scene and it will get even better.
So yeah, right now we are in what I hope is just a "local low" where the daytime office population is still way down, hotel occupancy is still not fully recovered, and residential has grown quickly but from a very low starting base. But in the longer history of Downtown, knock on wood it just ends up accelerating the shift of Downtown into a more well-rounded type of CBD.
Of course it is also possible it will spiral out of control, residential projects will dry up, and so on. But I think it is way too early to make that call, and I do personally think the fundamentals are strong enough to make it more likely it recovers.
Edit: The Pittsburgh Downtown Partnership's annual "State of Downtown" reports are usually at least interesting reads. They are of course promotional and not just neutral assessments, but they do include lots of basic facts about things like projects completed and projects in the pipeline:
https://downtownpittsburgh.com/resea...e-of-downtown/
They define a "Greater Downtown" that includes the Golden Triangle but then also the Lower Hill, Uptown, South Shore, North Shore, and Strip District. Depending on where exactly you are talking about in areas like Uptown or the Strip District, the synergistic effects with Downtown specifically may be starting to fade. But I do think in general there is a mutually-reinforcing effect in the sense that more jobs, more amenities, and more residents in this Greater Downtown area tend to encourage more such development nearby.
Anyway, the Strip is definitely accelerating in importance, but there are still a lot of Downtown residential projects in the pipeline, and again if you include the Lower Hill it then becomes a LOT of projects.
So I would emphasize that as a really important public policy goal. The Penguins dragging their feet with the Lower Hill is bad in general, but we are now at a juncture where I would suggest we really need that area to be developed in a way that ties in nearby portions of the Hill, Uptown, and Downtown into a continuous, thriving, multi-use zone with a lot of residential units.
I just hope the powers that be use the contractual options available to them to actually require the Penguins to get moving, or release the development rights so someone actually in the business of development can use them. Rather than continually letting them slide past deadlines without consequence, as has been true to date.