you can try with film capacitors also, but your volume of capacitors will be more.
Sorry, we must use the El caps, even though we hate them............but wait, do we really hate?.....i mean, reason for power supply fail is most commonly El cap, then customer wants to buy more power supply...so we make money again right?
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SOMETIMES YOU USE A PART BECAUSE YOU ALREADY HAVE IT ELSEWHERE IN THE BOM AND THERes no point in using another different part number (sorry about capitals).