About 18 months ago I swapped a Five for a Salsa El Mariachi. And it’s bumpy as hell. I live in South Wales where it’s rocky and rooty, and I had become used to pinning it down these trails. On the rigid bike I have no choice but to slow down a lot. Some descents take easily twice as long, and some really leave my arms and hands sore at the end. I’ve sped up once I’ve got my technique (re)-dialled in, but it’s still nothing like as much fun on descents. You can’t hoon about, round here at least.
Having said that – I’ve chosen it for 90% of my rides in that time. I’ve discovered that I love riding it because it’s such a stiff platform on which to pedal, and because I’ve been doing lots of mixed on/off-road rides which suits the geography here. I never liked riding the 5 on road so I didn’t explore the trails that needed road to reach.
However I personally would not have one for my only bike, but that’s because I like going fast on rough stuff and at trail centres. Depends entirely on where you live and how you like to ride.
Most fully rigid bikes can take a sus fork though so buy the bike, and put money aside for a spare fork. Win/win.