After many annoying little bugs and freeze-ups on KDE Neon User Edition, I decided to ditch KDE Neon for Kubuntu LTS. Neon is just too flakey to use as my main distro, it really is best to only use for testing the latest KDE features. I switched one of my other laptops, a Dell Vostro, over first before switching my 7300 first, just to make sure it worked OK, which it did. KDE on the LTS now has all the features I need and want on my laptops.
It was a painless install from a USB stick to my Dell Latitude 7300, and I have mainly just installed the essential apps I use such as Gimp, VLC, Filezilla etc plus kubuntu-restricted-extras, and this time I have installed Plank Reloaded to use as my dock at the base of the screen instead of customising a panel, and it seems to be working well so far, no show-stopping bugs yet. As usual the first thing I did was switch to Breeze Dark theme and also chose darker themes for login and lockscreen too.
There has also been a firmware update for my Latitude 7300 and that seems to have installed and stayed installed. I haven't switched over my main desktop yet as that will require much more configuring and the weather has been too hot recently to switch it on! I've also been looking into getting a more powerful machine to replace it too. Not sure but i think Plank Reloaded was causing graphical issues so I removed it. Also occassionally still get some odd graphical glitches, not sure why it is still playing up, I shall have to keep invstigating, but for now I shall keep Kubuntu on this Latitude and the Vostro.