i think thats too much (for "budget", low-cost SOHO device)
im okay with SPI, but see 2x or 4x increase in size - Reasonable(for safety purposes).
but prefer SLC-alike tech in it, like "SuperMLC" announced recently or SLC itself. 30x-40x more flash resource ? for "only" 1.4x-4x bigger price ??! for sure !!
Who said that hAP ac is a "low-cost SOHO device"?
Comparing to other vendors 802.11ac models probably yes, but this is current flagship of hAP line.
Even low-cost and mid-cost computers have 2-4GB of fast DDR3 RAM today, it's noncense to save cents from installing this SPI 16MB memory.
Well, MikroTik knows what it's doing no matter of my theorizing.