Rack Mixers
If your goal is to reduce space and optimize space, an optimal solution could be a rack mixer. As the name suggests, this type of mixer can be inserted into a rack where, in addition to the mixer, it's possible to insert other equipment such as power amplifiers, signal processors, and voice and guitar multi-effects. Thanks to the rack, your setup will always remain connected, so you won't have to go crazy connecting and disconnecting cables.
Moreover, the rack allows for practical movement of all the equipment while also providing greater security in case of accidental bumps.
If you already use a rack and use the mixer to manage a few channels, the rack mixer is one of the best solutions because it allows you to have more equipment grouped in a single "space". However, if you use the mixer to manage the audio of bands with more elements and instruments, and therefore need more channels, you should consider other solutions such as those offered by Passive Mixers, Powered Mixers, or the ultra-modern Digital Mixers.