Excellent write-up from Serge Thorn on how IT Architecture (Solution Architecture) is not Enterprise Architecture.
One of the key areas I think is most relatable to architects as a way to identify the differences is if you as an architect have a seat at the table in out-of-band SDLC processes. Serge calls it pre-project activities. I don’t like associating those activities with projects because it seems to me that these are not projects, they are very specific processes for governing, IT and business planning and operating our IT assets.
Those are just my thoughts. Like I said this post is a must read.