ARK's base taming speed on PC, PS4, and Xbox is now doubled, meaning 1× is as fast as what 2× was previously. Dododex has been updated to reflect this. Use the "presets" dropdown for common multipliers.
For full Purlovia taming details, get the taming calculator app.
Pros: you can bury them underground and put them on passive for a hidden storage box. You could bury them and put them on neutral or aggressive and when you get raided your enemies won't even have a clue what hit them.
They knock enemies off mounts and stun them.
They do crazy damage.
Cons: sometimes I even have a hard time remembering and finding where I buried them.
How to tame: find one that's already attacking something, when it wins the fight lure it into a dino trap and tame it. (If its badly injured give it time to regain health before taming).
Otherwise If you try looking for one under the ground it will stun you and most likely kill you.
Everyone talking about how they need to be ridable, actually read the dossiers and find out why they can't be ridden, especially this line "not suited to the life of a mount", also look at them, they have a far too slim build and skinny legs to be ridden, and for the in-game reason, firstly it would be kind-of OP to have a mount that can lie in wait invisibly for an enemy player or creature to walk over then stun them and do huge amounts of damage before they can fight back, secondly, they'd probably need some sort of special gear like a really long snorkel to stay under permanently with a rider, thirdly, the saddle would look ridiculous since you'd probably have to have a lot of straps and lie down on your stomach on its back. But still, one can't help but imagine the possibilities for say, surviving raids on your tribe's base by hiding underground or placing C4 in strategic positions around the underside of your enemies floors... But let's just say riding purlovias is better in mods.