Re: When you can
As someone who used and loved mythtv for >5 years, Kodi is simply much better.
I am running OpenELEC, with TVheadend managing the TV tuners as a "backend".
(OpenELEC is a minimal standalone distribution of KODI
It is much easier to setup and maintain, and has been running reliably.
I can watch TV from my phone, program recordings and use my phone as a remote control.
I did try running on a raspberry pi, but the cheap DVB-T2 dongle was unreliable, hence I use a desktop machine with a PCI tuner card (dual DVB-S2).
If I was starting again, I would maybe try LibreELEC, not OpenELEC, as it seems to have more devs at the moment.
If you want to try on a raspberry pi2 or 3, get a decent USB tuner, like the 292e nanostick.