For a long time I wanted to create a daily dev journal, but really wanted something super low friction. At one point I was just using markdown and putting in a git repo, but the process of saving was tedious. I was able to quickly import all the markdown files into Notion, and aside from giving each entry a title that has little semantic value, it's met and exceeded all my expectations.
I use obsidian + git (it has a git plugin that will let you upload to any git site, including your own). It's not as pretty as notion, but it gets the job done and my notes are in a few different places so virtually impervious to destruction :) . I just can't see not have a completely transparent and future proof note repository.