If I filter for through-hole aluminum electrolytic, in stock, there are 17,121 results. If I filter to show only those with an ESR value, there are only 2,767. If I filter to show only specific brands like Nichicon or Panasonic there are 45 capacitors left. Rubycon, zero.
When I buy capacitors it’s for replacing old ones in power supplies and other circuits, so I don’t know what ESR is needed. I keep seeing recommendations to use “low” ESR so I thought I should consider that when buying. It makes sense that “low” is relative and depends on the circuit. I have also seen discussion about having too low of ESR can be bad in some situations.