Down to 1mg now myself. It's definitely as habit forming as smoking, just without the nasty toxins and smell.
However, I can't say I've ever noticed any residue, staining, or condensed vape anywhere on my laptops or desktop PC's.
My brother has had his brother living with him "for a few weeks" for about 3 years and vapes with one of those silly big things that looks like a steam train releasing pressure.
The residue builds up on the windows, the mirrors and sets off the upstairs hall smoke alarm on a semi regular basis when he's vaping downstairs in the lounge if the back door is shut (a couple of puffs is enough to fill the room with a visible vapour and it's the atomised glycol that makes it so visible).
I can quite believe that some vapes will put out enough gunk over time to kill electronics as it's basically a mini smoke machine putting out clouds of glycol vapour which when it cools leaves a residue, not enough to notice instantly and because it's clear unlike the residue from smoking it's not visible but over time it's like running a chip fryer or similar without a suitable extractor fan.
If you're puffing away with the intake fans for something next to you it's going to be far worse for the electronics because you've basically got it set up so the computer is now working as an extractor/room air filter.
With regards to my brother in law, I had to replace his video card (and took the opportunity to thoroughly clean his cpu heatsink/fan) about 18 months after his brother moved in, and it was pretty close to how my dad's PC used to be when he smoked near it. the gunk was slightly sticky rather than "dry", just not as thoroughly disgusting.
Basically vaping as far as the computer is concerned is more or less like smoking, and anyone who had to deal with computers back before the smoking ban in the workplace can give you horror stories about dealing with the (often sticky) mess from the tar residue you found, especially on heavy smokers. Vaping residue is just less smelly, less brown, and may take longer to build up.