The short answer is yes. They would be suitable for the short runs into Virginia, etc., off the NEC. They've also recently introduced a hybrid model, which runs somewhat like a hybrid car, with diesel engines charging batteries for use in areas where diesel might be restricted. There is also now a hydrogen model, recently sold to a commuter agency in California.
Stadler has won its first contract for a hydrogen train, the FLIRT H2. The SBCTA will operate the train on the Redlands Passenger Rail line.
railway-news.com
Whether Amtrak would actually consider any of them has been debated here several times.