I use em dashes (but I'm a rebel so I use a regular dash between spaces - fucking sue me) all the time in my writing, and have been doing so for decades. I use it as a way to connect thoughts in a very specific way, a way that no other punctuation mark conveys.
Fuck the rules, man. Writing (and speaking) is always evolving, always changing, always morphing. YoU kan l1t3r4lly do ʷʰᵃᵗᵉᵛᵉʳ the բᵤ꜀ₖ ʏᴏᴜ ᴡᴀɴᴛ.