Five reasons not to use a block editor!

The first and most important reason is that there is no going back. The content created here cannot be converted into the format editable with the classic block editor, so pages have to be copied over one by one as text.
The second is that users who are locked into the block editor can expect to pay from $49 to $1000 per year, with add-ons also being paid for and no guarantee that development will continue in the long term. In this case, we are left with a website that is out of date, cannot be improved and may not even work.

Thirdly, there is no possibility to switch between block editors, as they do not manage their competitors’ modules for their own business interests.

The fourth argument is that there is no supportive community behind it that WordPress users have.

The fifth is that the Classic Editor is the most popular plugin since it became possible to use a block editor. 5,000,000 flies can’t be wrong.