To each their own. To me, it feels like somebody is always coming out with some new markup/markdown/plaintext formatting syntax every couple years and I have to relearn everything anyway so I guess my preference is just to have consistency on the sites I go to (so I can completely understand if you still use some BBS threads and have to change it up here). I used to know BBS and XWiki syntax at some point, but I mostly have forgotten them at this point.

I like markdown, but I am probably biased since I am a programmer and it is used in code repositories for creating readme files and is somewhat ubiquitous on the web with more popular sites like reddit using it as well as more niche sites like SG or naturalcrit.homebrewery (dnd homebrew templating site). If I have a complaint about markdown, it's that there isn't any commonly agreed upon standards (there are at least 3 or 4 different variations of it)... not a big deal for SG/reddit but kind of annoying for programming because different editors will support different flavors. I think what I like most about it though is that I generally have a few less characters to type than with other systems but maybe its just me or I am mis-remembering things again. :-)

I mean.. I can't help you if a few spaces are too much for you to handle
I don't think Markdown's going anywhere though