On 31 May 2018 16:40:04 GMT, David wrote:

We have a Bosch Rotak and it seems to be fine, although we currently only
have a small lawn. I don't know if you just had a bad example.

Mine is a Bosch ARM so perhaps mine's an even older model?

Best mower we have had was a Harry (no longer made) which had an alloy
deck

Yes, I see that the new ones are steel and I've read here that people
don't like them because they rust. It does seem a backward step.