[throwmeawaysoon]

>Lattice has been by far the favorite of the FOSS community

i'm interested in the OSS flows but i haven't dug in yet. so some questions (if you have experience): isn't it only for their ice40 chips? and how smooth is the flow from RTL to bitstream to deploy?

one hesitation i have with jumping in is that i'm working on accelerator type stuff, so my designs typically need on the other of 30k-50k LUTs. will yosys+nextpnr let me deploy such a design to some chip?

[floatboth]

I don't have that much experience (don't really have many use cases for FPGAs personally tbh) but:

Icestorm is for iCE40, Trellis is for ECP5 (which comes in variants up to 85k LUTs);

the flow is simple enough to do manually but there are things that make it one-click. This tutorial series https://youtube.com/playlist?list=PLEBQazB0HUyT1WmMONxRZn9Nm... uses one.

As for handling really big designs, I don't know.