My Sony hi-fi unit is happy for you to insert a CD - but resolutely stays in radio mode rather than automatically switching to CD mode. Why else have I just inserted a CD? I then have to hunt for the remote control - as the buttons on the unit have hard to read dark grey legends on black. It's hard to even find the flush black buttons on the black case.
Even when it is already in CD mode - it whirrs a few times - then displays how many tracks are on the CD. You then have to find the remote to tell it that you really do want to play the CD in the aesthetic order it was produced by the artist.