@feraug I agree, that if such mixed lists are allowed, it will be possible for a user to mix channels in such a stupid way that it takes too long to switch from one channel to the next (if e.g. mechanical re-positioning is necessary). But this is the responsibility of the user. Sorting the right way would be the the solution. If, for some reason, the user insists for a wild mixed channel list, then he must accept the delays. In any case it will be faster that doing it completely manual and pressing 8 to 10 keys on the remote control and checking visually for every key that it was the right one.
Against your argumentation speaks also the QVIEW key on the remote control. I use it quite often in the following situation: watching a terrestrial channel but want to see what is running on a sat channel. I press <LIST> <red-point> <down-arrow> <down-arrow> <OK> <down-arrow> <OK> and <exit>. These are 8 keypressings to activate the SAT receiver. After that small Odyssey, i can watch the last used SAT channel. Now pressing only once the QVIEW, i can switch between SAT and DVB-T any times i need. But the game is over, if i switch any other channel in between. Anyhow this proves, that it is possible to have mixed lists. Please believe me, i am scolding like hell, every time i have to make that switching. I have 2 LG TV sets (i thought it would be beneficial to have the same remote control). I have been working for over 20 years as an RF development engineer, so please don't tell me, that this is the best way to do it. Anyhow, as an engineer i will find a solution after my mistake to buy LG sets (build my own remote control for example) because its a shame for humans to do that stupid switching when easier ways are possible. On the other side i must admit that i am very satisfied with the overall picture quality and sensitivity of both TV sets.