Although I've used KDE for many years now I usually default to using Kate as my GUI editor and nano for command line editing, but now I heard about KWrite so took a look at it.
It is based on the same upstream code as Kate but seems to be slightly slimmed down. Kate does offer a lot more plug-in support for a vast amount of additional features and I realised again I'm only using the basics. Kate can even edit SQL files. I like that both have a mouse-over zoomed thumbnail view.
But the real lesson is, apart from always looking at alternatives, it's worth getting to know the editor you currently use, so you can enable some of those really useful tweaks to make your life easier, like highlighting matching brackets of variable types.
See How to use this KDE Plasma text editor
KWrite is a desktop text editor for KDE’s Plasma desktop. It’s meant to be a universal application that anyone can reasonably use when they need to jot down a quick note, write a school paper, do some programming, and/or anything else you can think to do with a text editor. It uses components of the Kate editor to create a simple interface but leverages those same components to provide a long list of useful features.