L&C go further lower with their lying transformers. I've had countless units with ERL-28 mains transformers marked as 35. Example shown below.

Note the outline of the L shape. A true proper 35 size transformer will fill all that empty spot, and to a degree so will a 33. The one shown there is a 28 size transformer and when desoldered, it reads "ERL-28 XP" followed by what is a datecode of when it was produced.

momaka wrote on Yesterday, 14:05:

There's generally no penalty for going with higher capacitance (even if doubling it), but sometimes there is for going too low with the ESR (certain older PSUs like this may oscillate very badly with caps with too low ESR.) Therefore, DO NOT use polymers.

It depends on where in the circuit it is.
The polymers work perfectly well with the +5V standby power supply.
Apparently, the frequency response of the standby power supply is so slow that it usually doesn’t require any correction at all.
For the powering PWM IC standby supply, I generally use a stack of 10 x 1μF 50V MLCC X7R capacitors.
Solder them in a vertical column 2*5 and fit a heat-shrink sleeve.
I just happened to have a bag of 100 of them in a drawer in my desk. 😀