I completely agree with you. Also one of the best summaries I've read so far was from tbr on sailfish-devel:
https://lists.sailfishos.org/piperma...er/006776.html

Anyway, whatever would be said, then a lot of people here at TMO will stay unconvinced, forever dreaming about the alternative history and "what if... " blaming the market, corporations, hardware manufacturers, NSA etc. and of course "dumb" users that pick up other OSes instead of their unlike, beloved, best one. Let's agree there is some kind of (similar to religious) cult around Maemo, Meego and Sailfish. The story is the same every time, a group of people, with limited resources despite all odds and giants (earlier Symbian, now Android and iOS) is doing a really interesting mobile Linux OS. What is intriguing though every time story includes same old mistakes like bad business/management decisions, delays, half-open sourcing, overpriced hardware (compared to competition specs) and many other similar elements that summed up give the same result in the end - failure that is. Despite that, any new attempt is welcomed with big enthusiasm, there's always a promise that old errors won't be repeated even though the faces behind those new projects are quite familiar to the previous ones. Some of those people through the time even earned a status of idols/saints. Whatever they say is a pure and unquestionable truth (at least to the most devoted cult followers). But the world outside keeps running away and the distance is bigger with every attempt.

Fortunately, now there are other mobile Linux OS attempts with many fresh faces like for example Ubuntu Touch and Tizen. They seem to be more promising and don't have the ex-Nokians heavy baggage. There are some noteworthy points about those alternatives. Ubuntu Touch - convergence and support of different type of technologies behind apps (Qt, HTML5 or even good old GTK+). Tizen - power efficient, successful on various types of devices (smartwatches, TVs, ...) and with smartphone sales recently getting close to those of Windows Phone (3rd OS in global market share). So no reasons to worry, in contrast to what some people say, Sailfish OS is not the only and last true mobile GNU/Linux attempt, others are worth attention and doing pretty well, just let go of prejudices and old cults - be open to change.

PS. Does the tablet have open bootloader? I remember it was hot topic for some of the people when crowdfunding campaign started.