The other consideration as you approach 'half-life is whether you'll still be flying in 25 years. I retired some years ago however I notice there is a small but significant/growing number of my ex colleagues who wouldn't be able to hold a licence even though they're under 65. There are others who have quit after 60 but not continued to 65.
BA is very much the curates egg. (Other threads discuss whether it's the grail or not). If you have the opportunity for a command pretty soon I'd take it. You'd be more 'saleable' with command hours than with F/O hours should you ever think of moving to another carrier. From my recollection (and this may be out of date now) 'early' (somewhat out of seniority or GSS) commands are sometimes available 'in the regions' with BA, but would you wish to move house/family or commute at age say, 55 for one of those (ie not LHR/LGW) as you see your projections of 15 years ago running awry.
The devil you know, beware what you wish for etc.
S
