I have a slightly different take - I wrote my own CMS based on Elixir. It's a static site solution, which means it generates, static HTML files that are then uploaded to a CDN (Eg. Netlify). My UI is done in VueJS and my database is actually inside of my application. I wrote a simple electron wrapper combined with docker in the background to deliver my CMS solution to my clients and it has worked really well for me. The reason being, I don't first of all need to collect my clients' data and store them on a central server, at the same time, my clients don't need to bother finding a hosting provider to maintain the site. They can just run this thing off their desktop and publish and be done with it. What's nice is, if they need updates and new features, they got to pay, which supports me and my work as well.

In fact, the whole project started out as writing a replacement for Wordpress from scratch. At least 6 of my clients' websites got hacked and one of them had a million visits a month. Simply because of stale plugins (it's easier to accumulate them than you think). So, long story short, I absolutely believe there is a place for desktop apps even in 2020.

BTW, I plan to open source my CMS soon :)

(and I do write about my journey here - https://medium.com/build-ideas)