Nodes that do not have enough storage will be shunned when they have no more room anyhow. So no need for other incentives or disincentives which only go to increase complexity and remove the “bring what you have and run them when you have computer on”
To pay more for longer on nodes disincentives ordinary home users who do not run their computer 100% of the time and windows users with regular updates restarting the computer. Thus the datacentre style setup will dominate and we lose most of our nodes runners who get a fraction of the earnings for each node.
The ordinary home user hopefully will become the majority of the node runners by a factor of hundreds to thousands longer term. To favour development for data centre style of node running is to long term reduce the decentralisation to the large setups.
We need to favour development for home users without negatively affecting larger setups. The priority is to be for home users who have small setup, potato routers, average computer setups and internet connections.