While this may not be the exact case of typical power electronics system designers (who mostly design by integrating off-the-shelf MCU and DSP chips), this article written by Geoffrey James is giving a good picture of the current state of FPGA technology and design tools for SoC design :
Trend #1: Today’s FPGAs are gaining features appropriate for SoCs.
Trend #2: The FPGA tool sets are becoming more sophisticated.
Trend #3: SoCs are proliferating into a wider range of products.
Trend #4: Converting from FPGA to ASIC is constantly getting easier.
This may give a hint to typical power electronics system designers who are mostly not familiar with FPGA technology.