It does have a pcie slot - which is why I mentioned that its more similar to the s920.
But its much more expensive than the s920, and also much more expensive than e.g. Dell wyse 5070 that has similar cpu and expansion if you buy the extended version.
It does, but then the Wyse is also significantly newer. Although...the S920 with the GX424CC is only around the same ballpark as the GX420CA in the HP t620 Plus. so I consider them to be adjacent machines.And also the Wyse has better CPU