I don't have any of these problems. copy-paste is only an issue in the Jolla browser. It works everywhere else as far as I can tell. And there's a fix already in git for it so it's coming.

I get voicemail notifications from my carrier just fine - an SMS if someone leaves a message. My SIP provider sends me an email with a WAV file in.

I never have connectivity issues roaming except for at home where I had two access points with the same ID - fixed that by just having two different IDs so no biggie.

The battery life is stellar. I easily get 2+ days whereas an N9 rarely saw me through a working day and always needed a quick charge before going out for a night. It outlives an iPhone 5c even.

Email works fine for me using regular IMAP. It occasionally shows 'email not responding' so it could be faster but otherwise it's reliable.

It could be I've got the perfect collection of 'things that work' but it's pretty good for me. If they fixed CalDAV so it worked with iCloud, implemented CardDAV and added SIP I couldn't think of another thing I'd want as a 'companion for professionals', personally.

I've Ubuntu on one of my laptops. I gave it about 6 months to see if I could ween myself off Macs. I've been using Unix since 1986 on an AT&T 3b2. The Unity UI is bad enough on a laptop but they seem to want to carry much of that over to mobile as well. I'd rather poke myself in the eye with a fork than use Ubuntu again as my primary OS. Sailfish does have a selling point - a UI that isn't developed by Ubuntu.