What are the pros and cons of a power cable for SATA drives with built-in 2200uF capacitors?

Question

Electronics

Dear electronics monsters,
I have a computer with a bunch of spindle disks, in order to better power them, I am looking at this product (sorry for the size, this is to consider it better):
Who does not know (not all monsters electronics specialists in disks): this is a power cable for SATA drives, distributing + 5V and + 12V at currents of the order of 10A, the conductor is usually copper 18-20AWG (i.e. 0.5..0.8mm2). At the start, each spindle briefly consumes about 2A + 12V, in total up to four consumers are hung on this adapter. A computer power supply can have either one high power + 12V power line, or several lines of lower power. I have one 50A line and a dozen drives (motherboard and core i3 consume little). I can start disks both simultaneously and in groups (I use PUIS). On the + 5V line, the load is several times less.
What is known: two 2200 microfarad capacitors are hidden in the massive cable connector on the + 5V and + 12V power circuits; I don’t know the electrical circuit, but it seems to me that there are almost no options here :)
Questions:
1) What will such a filter really give? Is there any real benefit in combination with a quality consumer (non-server) UPS protected computer power supply?
2) Are capacitors of such a capacity at such a cost of the product always electrolytic "banks"?
3) Does the capacitor limit the life of the product? How much (roughly)?
4) What happens when capacitors fail?
5) Is it possible to make sure that the capacitor is working without disassembling the connector housing? If yes, how?
6) Or just take a regular Molex splitter without any filters?
Additionally:
On the manufacturer's website: ORICO PPW-15PX4-170 .
Seen on aliexpress for about $11 at the time of writing.
Also mentioned here .

Answer 1

there were 20 HDDs, I soldered homemade power connectors and started 8 disks on one connector, the cable was 1mm ^ 2, what for, no conders are needed
PSU was Corsair 850W some kind of fancy, about 6k Coolermaster
also has such a cable