Apparently, Iron Beam still exists (or at least was demoed in 2024).

Originally, the lasers were going to be mobile, but now they have to be stationary, so it will work like the game Missile Command, except you have unlimited ammo, but no concurrent shots, and the missiles can't be rotating (like a rifled bullet would).

That's much more feasible-sounding that I'd assumed (coming from low expectations).

https://en.wikipedia.org/wiki/Iron_Beam

The US has deployed operational anti-drone lasers for a few years now, though not widely. They are still quite new but they have several kills. This is probably operational field testing for fine-tuning the design prior to producing them at scale though.