Does anyone else limit themselves to powering up only one of each legendary?

I can't see a reason to power up most of them.

I have a powered up Zapdos and Raikou...and am considering another Raikou.
Other than that I am not sure why I need to bother with any more.

I think we trainers should have been to get only one to begin with, but new features aren't one of niantic strong sides.

I know at least one person with 2 perfect Raikou. They're both maxed.

Yeah. I powered up one of each to lvl 30 except for articuno and suicune. Raikou is at lvl 35 and I will power up my best ho-oh too.

No I maxed out 2 entei and maxed out raikou and 2nd raikou almost maxed. If there are uses for them why not.

I maxed 2 each for now

For now I just powered up one of each and when the meta changes when gen 3 drops you can also power up another.

For now I'm just doing max one except mewtwo (want double psychic one and shadowball one). Have raikou, mewtwo and zapdos maxed/near maxed as well as Entei at lvl 30.

Would like to power up a ho oh but gonna wait for gen 3 and possible new moves.

I've only powered up one Raikou and my Mewtwo at this point. I'd power up more Raikou, but I'm waiting to see if there's a move re-balance/shakeup that would cause Zapdos to leapfrog him.

Articuno: Ice isn't relevant in the current meta.
Moltres: Fire isn't relevant in the current meta and there are better generalists.
Entei: See Moltres.
Lugia: Only worthwhile for Machamp solos, and I can do these without a Lugia. I do have a 100% so it's tempting for that reason, but I've held off thus far.
Zapdos: Raikou is better right now.
Suicune: lol
Ho-oh: I haven't had the opportunity to get one just yet, but won't be powering one up.

I transferred all but my best of each during the double candy event. So, my answer is yes. It only make sense to me to have or power up one of each.

Disclaimer: my decision was easy to make because I didn't have more than one of each above 90% IVs. So I transferred any lower than that to the professor. This implied to discard some 87% but also to keep some 87% that were my best of this species,

I have so far only powered up Lugia (for the Machamp 1-mon solo challenge) and Raikou. Feels weird to me to have more than 1 powered up so I think I'll power up a Zapdos rather than another Raikou next.

Yes, just one of each, though I haven't availed myself of every one yet.

I have only powered up a raikou and a zapdos

That is my general rule, but I have made an exception for Raikou (3 powered up) and would make an exception for Mewtwo (only have 1, but would power at least 3, 1 of each charge move except for hyperbeam).

Raikou is too valuable as a raid attacker, plus we had Suicune in the last rotation. The legendaries I have yet to power up include Articuno, Ho-Oh, and Suicune.