the reason for the catholic churches using electone/s traces way way back. in the mid 1900s kasi churches (cathlolic) used organs... so un ung na instill sa minds ng mga tumutogtog( karamihan kasi ng sa cathlolic churches medyo may edad na ung tumutogtog kaya electone ung mga nirerequest pa rin nila. but in the 1960's nagkarun ng Second Vatican II meeting which is called "Aggiornamento", ung mga nakaugalian na sa old beliefs ay medyo binago. un ung time na ok na ung piano and keyboard sa church.
isa pa, if the parish priest is a "charismatic" type, ok sa kanila ung mag keyboard or piano, the rest, organ pa din. in our church, we have a korg SP 100 and yamaha PSR 550, tinago na ung old technics na organ. we even have drums sa church, complete kami with instrument amps, bass, electric guitar, keyboard, acoustic guitar... in some Masses, we have a full band set-up...