I think this is an oversimplification. Having something that does one thing and does it well works for simple things that can be composed. Sometimes this is not

I think this is an oversimplification. Having something that does one thing and does it well works for simple things that can be composed. Sometimes this is not the case, as the composition would be too cumbersome or too slow. The example of Obsidian (in my eyes) confirms this. Markdown is a very simple and elegant way to produce simple documentation, but as soon as one needs more it just crumbles. I agree that the big tools (Word, excel, photoshop, etc) are bloated. These applications have crossed the bridge into 'they do everything about X' long time ago and they work well in their very wide problem space. Just taking excel (or Calc) as an example, I cannot see how using simpler tools I could create pivot tables and aggregate values across multiple sheets.