Why upgrade to Gen2

My 8 zone Gen1 unit works just fine. What additional features or benefits are there if one upgrades to Gen2.
I have had it for two seasons and based on the reported savings in water usage I have another season to go just to get my ROI on my Gen1 unit? What is the justification to upgrade?

@wchp - from @Franz’s post here Generation 2!

So I’d say manual control buttons and flow sensor capability if you want to add that are the reasons today. I’m not sure if there are any platform integrations that can’t be done with the Gen 1 version today. Oh, and living on the cutting edge!