I switched to mirrorless some 1/2 dozen years ago and now all of my cameras are mirrorless. I can make a couple observations:

Overall I'm happier than not for the switch and would do it again. I switched to get smaller and lighter and over all. I did get smaller and lighter but it may not be as big a change as it first seems. Mirrorless makes the camera smaller but not the lenses.

Biggest plus for me: Mirrorless cameras reduce the sensor to flange distance substantially. This means I can put just about anything in the way of lenses on my cameras and I do. One of my favorite macro lenses is a 60mm Rodagon enlarging lens. I like wide angle lenses and that mirrorless flange distance allows for better wide lenses because they don't have to be designed to clear the mirror. This is enough for me to call it an overall positive change. I have some wide lenses that couldn't be used on an SLR.

Biggest minus for me: I want my OVF back! Half a dozen years later and I still want my OVF back. I miss it and as much as I've adjusted to the camera's EVFs they're not the same and I'd much rather look through the camera and see what's there rather than see an electronic interpretation of what's there. I will never entirely adjust to the loss of an OVF.

Another plus however with the EVF is focus peaking. It goes hand in hand with the various manual lenses I use. The EVF can magnify the image for precise focus.

Another mirrorless minus worth noting: Seems like I'm always charging batteries. When I shot with my SLR I didn't consider it a basic requirement to have multiple spare batteries and always be sure they were charged. I was accustomed to taking out the SLR and using it all day on a battery charge. Now I have a drawer pretty much dedicated to a collection of chargers and batteries that I'm always charging.