Comment by tom_
If you used them when they were current, the emulator experience is never quite the same. The input latency is always detectably worse, especially without a CRT (and even now you're no longer 15-25 years old), and there's always at least a bit of sound latency. Also, you're using a modern keyboard and mouse.
On the flip side, all the original hardware is now ancient and at least somewhat broken (or going that way), and it's a pain to keep it running as an ongoing prospect. CRTs, floppy disk drives, floppy disks, hard disk drives, key switches, mice with balls, aging capacitors, batteries, little plastic bits inside the keyboard that you didn't even realise were there until they crumbled into dust - they all go bad in the long run, and the repair always eats up at least a bit of time. (Even assuming it's actually repairable! Battery damage can be literally unfixable. Parts supply generally can be an issue. Mouldy floppy disks are time-consuming to rescue, and can damage the drives as you attempt it. Those little plastic keyboard bits are theoretically 3d printable, but you'll need to figure out what shape they were originally and how to glue them into place. And so on.)
The long-term prognosis for modern computers is uncertain too - but the nice thing about them is that you can always just buy another one. Turns out they're always making more of them!
> On the flip side, all the original hardware is now ancient and at least somewhat broken (or going that way), and it's a pain to keep it running as an ongoing prospect
Fortunately there are FPGA implementations, though you might want a non-USB gamepad and keyboard, and a CRT (or maybe a 120Hz or better HDMI display?) to get closest to the original performance.
https://mister-devel.github.io/MkDocs_MiSTer/