At the rate the bitcoin blockchain grows in size, 2.2x the growth worries me a lot more than 1x growth.
It really shouldn't. Doubling the storage requirements is mathematically very little. If you can afford to store 10 GB, you can almost assuredly afford to store 20 GB. If you can afford to store 1 TB you can almost assuredly afford to store 2 TB.
It really isn't about what you can afford, it's about what you can do. If you're on a laptop with an SSD, you have 128GTB, maybe 256GB if it's a new one.
Sure that's enough for now.... but what's this 2TB you're going to plug in to your laptop and how is it going to work?
roy
The point is that increasing disk space on an arbitrary system is usually much easier then increasing RAM. Most consumer motherboards currently max out at 32 GB, and the blockchain might be that big 12 months from now. You can get yourself a crazy $10,000 server that is expandable up to 192 GB of RAM... but even many older consumer PCs now can hook up a HDD through (e)SATA and get 2 TB for less than $100.