Any benefits to use /var and /tmp as RAM disk?

[OpenSense]

Hey guys. So I recently bought a router from Aliexpress and I installed OPNsense on it. I was watching a few tutorial videos on OPNsense and Pfsense since I am new to these types of routers.
I remember watching one tutorial and the guy said it is recommended to put /var and /tmp as a RAM disk so it won't wear out my SSD, and it can also help with security. I see that I can do this in System > Settings > miscellaneous.
I tried Googling it, but I cannot find anything recent about this.
I have 8GB of RAM on my router, and idle I am at around 5% memory usage. So I have more than enough RAM to do so. But would there be any benefit? Would there be any risks?

[marjohn56]

You lose certain historic data when the system reboots but nothing critical. The senses both re-create all the important stuff afresh on startup. It's how I've had my systems running for years. So that advantages are less I/O on the drive, faster I/O because it's effectively a RAM drive; disadvantages are loss of that historic non critical data, which I for one am not that interested in. I cannot think of anything else, someone else might do though. 

[dinguz]

I believe it's mainly for historical reasons, as most of the older Alix/APU firewall appliances and the like were sold with compact flash cards instead of 'real' harddrives. Running these mount points as a ramdrive reduces writes to the media and prolongs its lifespan.