My vintage [well.. early 80s] Korg Poly 6 is as much a 'Folk' instrument
as any mega expensive elite hand crafted modern squeeze box or bag pipes..

.. and now due to failing components it plays quite erratically,
squarking and honking and crackling
without any regard for the notes actually played on the keyboard..
That's when it's not too temperamental to even switch on and emit any sound at all...........

So I'd argue that makes it even 'folkier' than any affluent folkies's brand new Hurdy Gurdy....