My Atco with a 3.5hp engine + roller lasted for 27 years. Unfortunately the two mowers I've had since (i.e. in the last 4 years) have been rubbish by comparison. Current one is a Hayter - similar engine size, plastic deck, no roller, electric start with the option of pull-start - but, that bit won't work for me. Easier to fill the fuel tank than the other machines though, and it has a "mulch" setting. It's supposed to be "semi-self-propelled" (whatever that means!) and I find it really quite hard work on the bumpy & uneven areas of my garden, OK on the good bits though. The so-called lawn is definitely somewhat the worse for not having a relatively heavy mower with a roller, which coped well with molehill remains/subsiding mole & vole tunnels/rabbit latrines etc.
The current Hayter has a couple of features which I really don't like:- it's almost impossible to connect the charger unit to the machine and just as difficult (when you've finally succeeded) to disconnect it. The other thing is that it's really quite awkward to remove & replace the grassbox.
I didn't try the machine myself before I bought it - just had a demo.- so I suggest you try to have a go yourself with whatever mower you're considering and that might help with your decision.
btw my nickname is the one I used on the Beeb - HCF was one of my whippets (now only recently deceased) and I'm in fact a granny, who's often known as "Ma".