I used a Laserjet 5 for several years. I can't recommend it anymore, but it's a fantastic printer. The only problem is availability of *good* toner cartridges.
It had great print quality, the toner lasted a very long time and original unused cartridges were easy to find cheap on eBay. HP changed their packaging over the years so it was easy to recognize the newer boxes, but eventually HP stopped making them altogether.
The LJ4 and LJ5 are essentially the same printer, based on a Canon mechanical platform which is built for multi-user workloads. The service schedule recommended an overhaul at 100K pages - the printers often logged a few 100K pages in offices.
They can use parallel, serial, and an "EtherJet" network card. I used the Ethernet card, but I also noticed a bug with it. If I sent multiple print jobs in quick succession, some of them would be missed. That only happened when using the Etherjet.
They have a VFD display which can be programmed to say random things through software. I remember reading a thread somewhere where somebody got fired because he thought it was funny to send weird messages to an LJ5 in an office, causing a day-long phony panic with IT.
They had a good driver for Windows 2000, but with XP I could only use a driver that was provided with the OS. It was missing a scaling option that the Win2k driver had. Fortunately the software I was printing from could work around that. Later I switched to linux, don't remember if it had a scaling option or not.
The LJ5 was a totally reliable workhorse for me - I used it daily when I had no time or patience to spare for printing problems. It was a complete cure from the aggravation of inkjets.
Unfortunately, replacement cartridges started to be increasingly prone to vertical banding. I started having to toss out cartridges from banding, and not because they were empty. Some were banding right out of the box. It got so chronic that I started to think my printer could be a factor. I thought about doing an overhaul of it, but I fear the population of toner cartridges has just gotten too old. HP stopped making them many years ago now.
So because of that single issue, I can't really recommend that printer anymore. I loved it but I'm afraid the supply of toner cartridges has become such a major problem that I'm now doubtful I'll ever get it running again.
I now use a Brother DCP-7020. No particular reason - it was at Goodwill so I bought it.
It has drivers for every OS that I've ever thought about running, but I'm not sure about Win10 or 11. I have used it on WinXP, Win7, and linux.
It seems prone to random black splotches, especially after I add paper or mess with/replace a toner cartridge. It gradually clears up. Not a problem for my usage but if print quality is critical it would be an issue. That's probably an issue with my individual printer, not the model in general.
It has some sensor that's supposed to detect when the toner cartridge is empty. Of course it says it's empty way, way early. You can easily get double the toner life by defeating that sensor, especially if you don't need great print quality. All you have to do is tape over a window on the drum assembly (which holds the toner cartridge).
Thus far the replacement cartridges have been in ample supply on eBay, I think usually about $30 for genuine Brother, never tried a knockoff.
It uses USB and parallel, no network.
The display is faded and hard to read - it hasn't held up like the VFD display on the HP Laserjet5, but the HP was a more expensive class of printer originally.
I think it's a little more prone to faux-paper-jams than the HP was, but not enough to be a big problem.