system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] Why didn't Stark use Nanotech in Spider-Man: Homecoming?

At the end of Homecoming we see Tony offering Peter the Iron-Spider suit, which, as we seen in Infinity War, uses Nanotech similar to that of the Bleeding Edge armour.

If this tech was available to offer to Peter at the end of Homecoming, why wouldn't Tony use this much more Portable suit throughout Homecoming?
gpt
Probably because Iron Man Mark L was not completely ready yet. The Liberty Island Ferry Incident devolved almost immediately and hence Stark opted to use a more proven suit (Mark XLVII) rather than a prototype. By end of Homecoming however, it's plausible that he worked out the kinks enough to create the Iron Spider suit for Parker.