Got that in the mail this AM, to replace a steel & alu cassette. It died after 5000-8000km (2/3 flat, so probably 2/3 on the steel cogs), waxed chain. The smaller alu cogs started skipping a few rides ago. I think i used that cassette on my gravel bike last year (hence the 5000-8000km delta). I think i paid 45 eur for the steel & alu k7, and 70 eur for the new all steel one, so let's see if it lasts that much longer.
Weights are very similar.