BTW, for those who had only tried KDE years ago (i.e. KDE4 and/or older and/or earliest KDE5 releases) and didn't really like it (e.g. default KDE look&feel had

BTW, for those who had only tried KDE years ago (i.e. KDE4 and/or older and/or earliest KDE5 releases) and didn't really like it (e.g. default KDE look&feel had always felt mediocre to me and reliability of KDE4 and early KDE5 was bad), today KDE5 looks and feels much much better (to me at least, I dunno about default themes/settings in other distros but in Manjaro it's delicious and makes an awesome replacement for Unity (R.I.P.) after some tweaking).