I only have the one bike built up currently, a Ragley HT…I can do most things on it, surely the very point of a MTB is that they are versatile and can turn their hand to anything?!
If your only riding is XC racing and training for example then get an XC focused bike, if you only ride uplift days get a DH bike etc….but if you do a bit of everything the bike should reflect that.
The Ragley has been designed to run forks from 130mm to 150mm, I run mine at 140mm and it’s a great UK trail bike.
It’s also hardy enough to take on uplift days, compact enough to play on dirt jumps (I had it over at the Milford trails dirt jumps this weekend) and it’s comfy enough to spend all day on if I want to cover some distance.
It’s far from perfect though, it’s a heavy lump when doing a bit of hike-a-bike and the back end is less compliant than other HTs I’ve owned over the years.
My FS (when built up again) has a similar ethos, it’s a Giant Trance and should be able to make a good go of most riding when it’s finished…when you have one bike you have to be careful not to go too far in one particular direction (too slack, long travel, inefficient peddling) for example, can leave you frustrated on normal trail/XC type rides….likewise a bike with steep angles, twitchy handling, short travel etc may put you off trying more DH type stuff or put you off entering Enduros etc….