Stereo speakers are a pleasant detail which should have become a standard long ago. Nokia N900 has stereo loudspeaker, for one. N9/50, unfortunately, had non-stereo loudspeaker, at the bottom of the phone. Will Jolla phone have both noise-cancelling microphone and stereo-speakers?..
I would buy Jolla... If I had money for it and need for another phone. Right now:
I use N900 (with CSSU Testing) as mobile phone, camera, map, alarm clock, address book; the screen is heavily scratched, and the battery might have problems, after three years of usage;
my friend had recently got N950 (installed Nemo on it) and doesn't use it much, as phone or otherwise;
another good friend is used to small phones:
first one lost in sand and water, found later not-working, replaced with an identical device bought from the manufacturer;
soon, the new device had microphone problems after a fall, and is now used only as a camera;
an antiquarian [without camera] cellular telephone, dust-proof, water-proof, shock-proof, is in use now; but the charging-port plug has been lost for a long time, so water-proofness should not be put to test.
New device could have a place in our diverse family, but it should have very strong glass, and be shock-proof - be prepared to being used as child's toy:
flying in the air, thrown onto concrete or asphalt (in this regard, the bezel of N900 was very helpful), being buried in sand or floated in sea-lake-bathroom water,
drawn-on with graphite pencils, ballpoint pens, coal, wax pencils, chalk and crayons, wood and stones,
taking high-quality photographs, videos and sound recordings,
tracking geographical location, by any and all means possible,
working as flashlight, and if necessary, as siren,
being virtually impossible to destroy, turn off or lose - and yes, this requirement includes non-removable high-capacity battery.
Preferably, this device would also develop child's musical abilities by offering high-quality loudspeakers and excellent musical software.

About dead-end phones, a Chinese proverb:
Try to save the dead horse as if it is still alive.
Nothing is impossible.
Do the impossible, for it may truly be possible.

I do not get a mobile device and expect it to be regularly updated. I get a mobile device expecting it to be either a finished product, requiring no updates (I have such a personal digital assistant, gathering dust as a museum piece; fully workable, but it is not needed in these times of mobile computers with cellular radio), or an unfinished product which is extended and updated by the keen community.

Best wishes.
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Per aspera ad astra...