I don't use FPGAs (tooling is too poor, languages are bad, up-front costs are high) but I hang out on FPGA forums and the overwhelming consensus has been bad. Chipmakers and especially high-performance chipmakers have always been focused on high-volume and/or high-margin customers, but the Intel acquisition has made Altera worse in that regard. Their sales and support teams were integrated into Intel and now you can't get any support from them whatsoever even if you spend $MM/yr. You need to funnel even basic questions and bug reports through a distributor contact to have any chance. I forget the specifics but they made tooling even more restrictive/expensive. The only new products out of it are a few Xeons with built-in FPGA ($$$$$), good for HFT guys I guess.