@prw @Aleums

They get hauled out either for re-use or the scrap metal value.

(I've helped put on raves in actual abandoned tech buildings in the early 2000s, I used to live in a town called Reading in SE England which is basically "British Seattle" and had all the tech companies in it (it still does to some extent), but quite a few folded in early 00s and/or sent all their work to lower income countries..

By the time the tech company is gone, all thats left is the empty warehouse and maybe some legacy telecoms kit (by mid 2000s I had so much of it from these places that at my family home there were phones and network in every room, and you had to dial 9 for an outside line when making a phone call 😁 )