anyone still using this in 2023?

[Wik]

i mean it still competitive in this year?

 

[mjf]

this is an old siemens mkt capacitor,
6,8uF / 100Vdc,
part number B 32534,
probably more than 30 years old.
you can use it in speaker crossovers or so what...............

 

[Galu]

It's an MKT (metallised polyester film) capacitor, Wik. MKTs are very rugged .

The same type is still in use today, i.e., your MKT is "still competitive in this year".