Roon Nucleus RAM upgrade | recommended Crucial module discontinued

Hi, in another conversation, Roon staff suggested the Crucial DDR4 2666 MHz CL19 2 as suitable RAM modules for memory upgrade. However, Crucial‘s website shows this family of modules as discontinued. The current product line apparently is the DDR4 3200 MHz CL22, hence higher speed and difference CASLatency. Will these also work?
And does it make any difference whether using a single rank or dual rank configuration (i.e. 1x 32GB vs. 2x 16 GB)? Thank you.

Faster memory will work fine, although of course provide no extra benefit.

The nuc has dual memory channels - so it’s better to use two smaller modules rather than one larger module.

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And be amazed at the price jumps in the US. The 16 GB set of DDR5 Crucial memory I got in the beginning of Oct has now tripled in price.