Why have so many orthodox synagogues closed down, and is this rather specific to my geography (Northern Virginia/District of Columbia)?

I have been making an effort to attend synagogue with more regularity, and in attempting to find a way around the long distances, I have found that a number of synagogues, in my local geography and those nearby, have closed down, completely, some reopening as historical sites.

Is this phenomena specific to my geography, or otherwise uncommon?

I have also visited philadelphia, earlier this year, when I did have a car in my possession, and I found a distinct lack of Orthodox synagogues, there. And on my drive home, which was fitting of someone who is driving through an unfamiliar city for the first time, I saw a synagogue that was quite beautiful to me, though it had closed down at some time previous to my visit.

Given my lack of resources, and unfondness of scrolling the screen of my mobile device for hourd time, I would rather attend synagogue in-person, and this pattern is frustrating to me.

There is a Chabad house somewhat near me, shoutout to the Rebbe- I may see him at a farbrengen sometime, although, as it is a more intimate environment than a typical synagogue, I do feel a bit weary of attending one and making a poor impression on those in attendance, which is not a want of mine.

I am unsure of this matter has been brought to attention in this reddit previously, please do pardon this post if it has.