iPod Touch is stellar for music listening & playing instruments through effect apps, and multitrack recording as well. The cost of the Touch is about the same as one good guitar pedal, but low-cost apps allow a slew of effects often on par sonically to its physical counterparts.
The next step seems to replace the analog TRRS jack with digital via Lightning, a la iPhone 8 & X. Items such as iRig will have to accommodate the change, and more consumer expense, but alas a cleaner signal in & out. Granted, there are Lightning audio interfaces, but specifically the iRig Acoustic pickup would greatly benefit by a digital connection.