I managed to get one last year as I wanted (note not “needed”!) a synth. The boss sy200 tempted me but when a c4 and midi switch popped up for sale here I snapped it up. I prefer it to the future impact as it’s smaller. I like the software.
The majority of good advice on here has been given. It can replace a few pedals, it does synth and some env filters well, but you need the midi switch to unlock its full capabilities. I have specific songs downloaded to presets. There’s a nice sounding moogesque patch on there to download that I specifically wanted for one song.
But.. I also have an oc5 and a couple of env filters (mainly for fun). Don’t sell your oc2 keep that as an investment.