There is another point that I might not have mentioned. Let's assume we are at 1TB of storage, with 4k nodes thats 4k TB. Most MNOs use VPS's that cost around 1$/GB/Year. This would cost each MN 1000$ / year in storage costs alone or 4M for the network. If platform takes off it will be a lot more. We can either decide to basically give a shit ton of money to VPS providers -- OR -- we can be smarter and have things cheaper for our users or the MN network with little tradeoffs and maybe even benefits.
That would be dream come true if this would be the case ! , Dash value per coin would at minium be 10x where it is now, you would more than enough funds to higher suffient amount of devs to work exclusively on Dash platform sharding, and well before that happens we could set some limit (much higher do than eth still has) and just earn a cool 10dollars+ per transactions (just like eth did). You could also higher a team to implement Schnorr signatures, saving even more data storage.
I am not sure if you understand the concept of decentralisation well enough, it not just math, its about people NOT being able to form a cartel. One can easily image that you fit a crowd of of about 100people in one building and get to consensus, the Davos/WEF/Bilderberg are able to do it !
Maybe read(it's about the creation of the FED):
The Creature From Jekyll Island
by G. Edward Griffin
You'll get a good idea where I am talking about. Please don't kill Dash.