I’m not a regular writer here but I do try to write fairly regularly. One major problem I am having at the moment is the stability of the Squarespace web editor.
I will write for about 5 minutes and the web page that I am using for the editor will crash. This seems to be an incompatibility between Squarespace and Safari but it is happening so often that it really is unusable.
The Squarespace editor is a complicated bit of code and does amazing things given the limitations of web browsers.
But a web app needs to be stable. It has taken a long time for me to trust the reliability of complex web apps and Squarespace is failing very badly at the moment.