Yeah I remember my Hard Tail 29er, It was a buncha fun but it beat the snot outta my back side, gave me a sore lower back and generally wore me down In short order.
I'd love to build one, light, simple, playful but In 27.5.

On the very first time out on my brand spanking new full suspension, on every segment of every trail on my regular 15 miles workout route I set personal records and not just a few seconds here and there,,per Strava.

When I was standing and bouncing the hard tail down a trail barely touching the ground or hooking a hard corner I was always on the edge of traction, hanging it out there as we used to say,, a real blast, loved it..

But when I rode the full squish down those trails I could pedal more often and that meant more speed, speed Is our friend remember

I could choose a different line more often and later in the game,
I could truly forget about the rear end when things got hairy and just ride like a Grizzly was on my tail,
I could screw up more often with less bad endings,

I'm a hack, I need a full squish,, but there's something about a hard tail that's hard to explain...

Yeah I think my next Hard Tail will be a single speed but It's gonna have front suspension I tell ya !