My work gave me $1000 for office stuff to work from home. They also provided a KB/mouse, three 1080p 24" monitors, a UPS, brand new laptop, a dock for the laptop, cables, a headset, etc.

I already had my system set up for work from home including two 1080p displays, a 1440p display, mechanical keyboard, wireless mouse with charging mouse pad... Even a headset and KVM.

I spent the money on an additional battery for my homelab rack (which will extend the uptime of my firewall during a power outage.

I'm pretty happy with my setup, I combined everything, and decommissioned my oldest display, and bought myself a laptop stand, so when I'm on my PC (selected from the KVM), I have five displays, three wide, and two above. When I select my work laptop, the laptop screen becomes a sixth monitor, and the stand props it up to be one of the top displays, so I have a 3x2 grid of displays.

I'm usually fine with three for my personal use, but more are not unwelcome, at work I was pushing from three to four pretty consistently in the past few years.

Though, I find that having a 1920x1200 or 1440p display set up in portrait is usually pretty helpful for work. So I can see more of a page. I wouldn't recommend doing that with a 1080 display, since most sites that have a static width are optimized for screens that are at least 1280x768 (around 720p) and going down from 1280 px wide to 1080px wide, results in some horizontal scrolling.... Which is never fun.