A bit bittersweet, since Canvas was a great starting point to develop themes for quite a while there--at the same time, I'm almost surprised it took this long for them to admit to themselves that Canvas hasn't really been keeping up with other themes the past few years (including Woo's own Storefront theme).

I migrated several sites that had been using Canvas since 2012 to GeneratePress (free theme + premium extension) late last/early this year. If you're feeling left in the lurch by this announcement, I highly recommend checking it out:

GP, like Canvas, has 1) the ability to change sidebar layouts on a per-page basis, 2) well-documented hook reference, 3) similarly organized menu options (primary + secondary menu), and 4) works w/ WooCommerce out of the box (unlike Genesis, unless something has changed recently that I don't know about).

Unlike Canvas, GP has 1) the ability to disable page elements on a per-page basis (replacing the need for many of my old Canvas page templates), and 2) very quick support responses (not trying to be harsh here, but it's true).

Note: I have no affiliate w/ GeneratePress, I just looked into a lot of themes/frameworks to take the place of Canvas and I'm happy with my decision--so I figure others in a similar boat would be looking for the same things I was.