Synology NAS ssh access – “hardware accelerated ciphers”

In the Control Panel within the area “Terminal & SNMP” there is now a checkbox labeled “Only use hardware accelerated ciphers“. But only my DS115j has this checkbox, my DS112+ and my DS213+ don’t have it. I have no idea, for how long this difference has been effective. Maybe from when I started using the DS115j – it’s the most recently released product of all of them.