LibreOffice’s default spellcheck is awful.
I hadn’t noticed until I joined a writing group that uses Google Docs to gather feedback. Google caught a lot of stuff and I started to think it would be nice if my word processor had similar functionality in 2021.
I read up and discovered LanguageTool, a LibreOffice add-on. It requires Java, which made me nervous about performance, but it’s been fine for the past week or so. It’s not blowing my mind, but it behaves much more like a modern spellcheck, so it was worth the installation for me.