have to agree here that for the UK 120mm is more than enough . I've ridden a Margam NPS race many years ago on a ridged single speed. I've done a few dragon races on a hardtail and came up with better times than chaps on long travel Dh bikes.

i run 130mm forks on my hardtail and only ever wind them up to full, when im on trips too Glyncorryg, Brechfa or Bedgebury. i only ever use about 110mm for everything else including descending off of Leith Hill, dorking(my localish thrash). no real need for full suss for UK trail/XC riding.

Why don't they do adjustable travel rear shocks?

For UK trail riding a 5" trail bike is ample, full suss or hardtail is personal preference. If you're ever heading somewhere like the Alps however then you're gonna want more of everything (suspension, tougher wheels/tyres, burlier frame etc...)

I hear you on the travel adjust front too, who cares about fine tuning to a single millimeter. Logical increments only PLEASE!!!

I've had my 100mm full suss 2006 Marin Mount Vision for about two and a half years, I've done Afan, Lake District, Peak District, Leith Hill, South Downs, Cannock Chase, Bedgebury and stacks of cracking local trails, enjoying every minute. This bike goes up anything and if I don't go down something it's me that's bottling out, not the bike. I have the shortest suspension bike out of all my riding friends, and I'm seriously thinking about getting a 140, however, those friends are trying to pursuade me not too get one as they think I'm stupid enough on this one. it's only the fact I want to crack the Alps and perhaps do the Megavalanche that I'm thinking of upgrading!

some bikes do have rear travel adjust: think Intense and Nicolai, for instance.

My Scott Genius has lockout, 80mm and 140mm rear adjustable on a lever -works fab so why don't they do it for forks?