I have owned and used a number of systems/notebooks with low wattage CPUs, ranging from single and dual core Atoms, to AMD Brazos/Zacate (E-350), to Core 2 Duo SU7300 (1.2GHz dual core CULV) and Core i3-2357M (1.3GHz dual core Sandy Bridge CULV).
I have used all of them with an SSD of one kind or another.
None of them were as "buttery smooth" as my desktop rig (highly overclocked gaming rig with SSDs).
The best way to future-proof is to save money and spend it on future products. (Ken g6)
SSD turns duds into studs. (JBT)