[mktmkr]

You don't have to use the tiny screen. Mirrorless cameras generally come with a large display. I almost always use the display on my Olympus because it's easier and I don't look like I have a machine on my face (this was also an important advantage of old view cameras with the focus screen on top, like the Hasselblad 500). If you want, you can attach a much larger screen to your mirrorless camera, they just use HDMI output so get as big a display as you want.

[hestipod]

I meant specifically when using a viewfinder on a mirrorless camera, it means looking at a tiny LCD/OLED screen inside an eyepiece that simulates the classic view vs through glass lenses/prisms for an actual optical view. I like optical viewfinders not little screens in tubes.

[mktmkr]

Sure but just because it's there doesn't mean you have to use it. It's there for nostalgia reasons, mostly.

[hestipod]

I disagree its nostalgia. I prefer composing that way and don't use it "because it's there", rather because I like to. It's more comfortable for me. It's also not bothered by sunlight washing out the display. It's not some impractical relic used for old times sake.