I use D every day at work (inherited codebase) and the UFCS bothers me to no end. I try not to use it.
Different situation, but I do admit when I first got into D I was wary of the UFCS feature and I avoided it, too.
Over time it felt a bit more natural and I began to appreciate it.
The major feature that it provides is pipelining (as shown in the article)
Meh... after not more than my first month into D this syntax grew on me and now I just use `1.writeln` everywhere. More than a few years later, I can't think of a single issue this has ever caused me.
https://github.com/Pure-D/serve-d
https://github.com/Pure-D/code-d
(I can't remember if the Visual Studio extension, VisualD handles UFCS or not)
http://rainers.github.io/visuald/visuald/StartPage.html
It's possible to implement, because Nim's language server handles UFCS, but atm D's doesn't do it (it's written pretty much by one people)
So personally I avoid UFCS except for very simple/common function like "to!" because it breaks the intellisense for that call.
Though if I knew the language inside and out probably I wouldn't care.
It's still my "favorite" language.
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SIDE NOTE: This single person wrote the D lang server, and has maintained it, written and maintained the VS Code extension, and other fundamental tooling + libs for years.
https://github.com/sponsors/WebFreak001
If you use D and feel like sponsoring someone, consider sponsoring them, or Rainers (VisualD), or the maintainers or LDC or GDC, also single individuals for the most part.
LDC Maintainer: https://github.com/sponsors/kinke
GDC Maintainer: https://github.com/sponsors/ibuclaw