I'm not to certain how well a bench PSU would work with an FPGA. These devices often require multiple voltages (like 1.0V 1.8V, 3.3V and maybe even 5V) all properly sequenced. There are regulator chips specifically for this purpose.
Check the last page of this document for the schematic of the power supply on a Nexys 4 DDR board:
https://reference.digilentinc.com/_media/nexys4-ddr:nexys_4_ddr_sch.pdfAt most, your bench supply could provide the raw 5V but in most cases, the board will be powered by USB or a simple wall wart. I use a lot of wall warts and have for many years. I just recently bought a Rigol DP832. It's a nice supply but, honestly, I have gotten along for decades without it.
Bench supplies are great for working with breadboard circuits. Two supplies can provide the bipolar power supply for an op amp circuit. Transistor circuits often require odd voltages and a bench supply is perfect. A 5V bench supply (adjustable or not) is handy for logic circuits. Lots of stuff to do with bench supplies but providing anything other than raw 5V to an FPGA is pretty much asking for trouble.
I could get buy with fixed supplies of +- 15V and 5V. That would cover just about anything I do and if it didn't, I could just add another downstream regulator.
I do like the idea of current limiting and that's one thing I can't get with a wall wart. The other day I was bringing up a Z80 project so I limited the current to 100 mA until I sorted out the bus contention problems. I avoided a lot of leaking smoke!