Imaro
Legend
Day balance is 5e wizard spells -- a pc gets so many, refreshed daily. This is not encounter balanced because that oc can burn them all in one encounter and have none left for future encounters.
Encounter balance creators effects that are limited in use to the encounter. 5e warlocks are more encounter balanced - they have resources that mostly refresh pin a per encounter basis and were limited to only a few uses per encounter.
These things can coexist, but the recurring discussions on encounter/adventuring day pacing that balances short rest vs long rest recoveries shows that mixing the two has issues that result from different pressures on play. 1 encounter pet day is as balanced as 8 for the warlock (with short rests), but not fir the wizard.
This is exactly the point that [MENTION=6696971]Manbearcat[/MENTION] is making: the different incentives and pressures on the game between encounter balancing and day balancing are often at odds.
I don't know... it would seem if one has the number of recharges of encounter abilities per adventuring day it would be trivially easy to move everything to a daily balancing paradigm if homogeneity is desired.