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DSLR
-Cheaper - not inherent to DSLR but just because they're old
-Use less power so longer battery life
-Optical viewfinder - has some advantages like not running at a limited frame rate like an EVF and can show more detail than the lower resolution EVFs
-Some can use some lenses that mirrorless can't with full functionality, mainly certain Nikon F mount lenses
Mirorless
-Smaller and lighter bodies and lenses
-Simpler, more durable with less to fail
-EVFs have mainly advantages like exposure preview, much brighter in low light, minimal to zero blackout when you take a photo, focus peaking, other overlays like histograms or even browsing the menus, can be higher magnification with 100% coverage and show more detail
-Can adapt a vast variety of lenses, can AF with many DSLR lenses
-Better AF with wider coverage and better tracking, except in very low light levels where certain DSLRs can be better
