Its funny, I'm just setting up Docusign right now, and it bears many of the signs of SPA-done-poorly, even in the most basic, constantly used parts of the UI.

For example:

1) Sign in and open the page showing templates, and my existing template is not displayed - just a whirring hourglass while some Ajax struggles behind the scenes. Clicking to deleted templates, then back again, fixes it.

2) Click to use the template, and I see no indication that anything is happening - then some seconds later a new page appears.

3) Even when opening a support page, the page doesn't render immediately, like a normal web page. Instead the outside of the page loads, then I need to wait while some Ajax chicanery needs to now load the content itself.

There are obviously plenty of people who can build SPAs well, but there are also plenty of people who have SPA fever, and don't ask themselves the basics first - like why don't I just make this a plain old web page?