I realized a comparison between two old Canon of 2002-2003

From my experience, if you are happy with a DSLR you might want to stay with that for a while.  Getting used to a mirrorless camera was challenging.  I do like taking video with the mirrorless cameras because I can use the EVF with that (we can't do that with a DSLR).  I also was able to change the video shut off/on button to the big shutter button on the mirrorless camera in the menu.  That tiny button was harder to use.

From a price standpoint, I think you would be happy with the Canon T7i (800D) camera or even the Canon T8i (850D).  Because I now have so much more ISO room, I often just use the manual mode with AutoISO.  Because the depth of field is important to me, stopping down the lens does that for me at any chosen focal length.  When there's movement having a faster shutter speed helps.  The ISO can move up or down to wherever it wants.  I don't choose ISO3200, ISO4000, ISO5000 and ISO6400 etc.  The camera chooses that for me.  I was amazed at how I could use ISO levels above ISO1600 with that newer camera and still be happy.  Yes, I'm sure if a person pixel peeks, there will be noise.  But from a general viewing point, it sure looks nice.

I'm not familiar enough with other brands and models to give you another recommendation.  I think someday I'll get a full frame camera.  I like seeing those images from people that show them, where there's so much detail and less noise.

Is rare that I'll purposely choose high ISO levels (unless I'm demonstrating something).  But when you need it, it is there. So I try to keep the ISO levels down, but there's times you just need that extra.  For fun, one time I kept taking pictures with the camera while it was almost dark.  Well, the images didn't look that good with that poor-almost-completely-dark lighting, but it was fun pushing it to see what I would get.

The Canon 90D is nice...larger and heavier...it's got 32.5 mp...but more money....  That would be my next choice.