You guys are giving Wawrinka way too much respect. His peak level comes around once in a blue moon, ...
Since USO'13 and his first GS SF, once-in-a-blue-moonwrinka made eight GS semis + 3 QF, i.e. the most GS semis and titles after Djokovic.
So far Thiem passed GS 4R once.
At slower surfaces AO/RG since 2013 Wawrinka won two slams, entered three more SF, one QF (Nadal at RG) and lost AO 4R to Djokovic and Raonic in virtual 6-setter and 5-setter.
Thiem made one SF after his top seed withdrew in the previous round, and one 4R.
Thiem is improving by every month, still a long way to go before he is the top 3 slam contender in my eyes.