I'm technical director of an agency that builds websites solely in WordPress, and I can say with feeling that Gutenberg has (so far) been a disaster not just in terms of accessibility but in terms of clarity of the development process. It's been a moving target since day one, with us constantly scrambling to keep up with large changes in each release. We held off for a while, and have only built three sites with it, but I wish we'd held off longer.
For example, there have been major interfaces changes on a regular basis, each of which we have to spend time walking our clients through. One change - defaulting to full-screen editing, which hides the menus and loses a lot of context that editors were used to - was pushed through at the last minute of a release cycle with a personal intervention from Matt Mullenweg. That meant that suddenly editors were confronted with an unfamiliar editing interface even if they were already registered and hadn't changed anything themselves, rather than a dismissible tooltip letting existing editors know that they could use a new full-screen editing interface. That seemingly arbitrary and personal style of project management really doesn't foster confidence that things are being thought through carefully.
I know from personal experience that you need to keep up momentum in a development project otherwise things stagnate, but so far the development of Gutenberg has been very much "move fast and break things" which would feel appropriate for a beta, but not for the default editing experience.
I think Gutenberg may well turn out to be really good - our clients do prefer it over the classic editor once we have it under control - but the way this has been managed has lost a lot of good will on our part as an agency and I've been actively looking at other CMSes like Craft as a result.
For example, there have been major interfaces changes on a regular basis, each of which we have to spend time walking our clients through. One change - defaulting to full-screen editing, which hides the menus and loses a lot of context that editors were used to - was pushed through at the last minute of a release cycle with a personal intervention from Matt Mullenweg. That meant that suddenly editors were confronted with an unfamiliar editing interface even if they were already registered and hadn't changed anything themselves, rather than a dismissible tooltip letting existing editors know that they could use a new full-screen editing interface. That seemingly arbitrary and personal style of project management really doesn't foster confidence that things are being thought through carefully.
I know from personal experience that you need to keep up momentum in a development project otherwise things stagnate, but so far the development of Gutenberg has been very much "move fast and break things" which would feel appropriate for a beta, but not for the default editing experience.
I think Gutenberg may well turn out to be really good - our clients do prefer it over the classic editor once we have it under control - but the way this has been managed has lost a lot of good will on our part as an agency and I've been actively looking at other CMSes like Craft as a result.