From that other thread…
You don’t really need to, no. I was thinking it would have come down in price, but after googling, adding more memory for you would probably be a three digit number. That is more expensive than I would have bothered recommending. For like $85, sure, but at $150? Probably not worth it.
Logic dictates all DDR4 memory like yours and mine is and/or will be dropping in price since DDR5 memory is now a thing in the world that you can buy. With that in mind, I would track down the exact identifying info on your ram and just check prices on PCPartPicker once a month or so. If it drops to a two-digit number, grab it then.
The listing says 16 GB (2x8 GB) Corsair Vengeance Pro RGB 3600, but it doesn’t say what the latency is. Lower is faster. A quick check showed the CL18 version cost $85, CL16 $120, and CL 14 $150. For context, my $65 gskill ripjaws 5 budget memory is 3200 CL16.