We have corporate deal with LH/SQ/EK and are asked for feedback quite regularly. When we were in UK we used to have the same with BA but then after some semi disastrous experiences we dropped them. They did not realise for over 12 months. I think they thought we had gone bust.
Mrs Mac still flies with them but I have not been on a BA flight since long before Covid. The last one being up from BA. Not missed.
Cheers
Mr Mac