Before digital signal processing came along, everything was analogue. Just because it isn’t digital doesn’t mean it isn’t as good! There are analogue effects from the sixties and seventies still in use in studios today even though there are digital or plugin counterparts available. One of the more well known analogue effects would be the Urie 1176 limiter. There would be very few records in history that does not have a Urie 1176 (or one of the many derivatives of it) use don it somewhere. Cult status certainly applies to the Urie 1176.
Another that is still used today even thought it was first made in 1957, and that is the EMT 140 plate reverb. To this day, the EMT 140 sounds amazing, and there are plenty of plugin options that try to emulate this great reverb, but no one is in a hurry to put their hardware out to pasture just yet. Roland’s Space Echo devices like the Roland RE-201 are worth a small fortune these days, as guitar players and studios chase after that warm sounding delay that only analogue tape can provide.