One of the main attractions of Fldigi (and companions) is the simple and clean UI.
As a result everything works well on lower capacity hardware, and works very well indeed.? Even on a little Acer One, that only has an Intel Atom CPU.? Not exactly a computing powerhouse, but is great for portable use.? (Even the more complex MFSK modes work well.)
Please don't go down the bloatware route!? Just because someone thinks things "Look Old".