Its all hypothetical mate - many of our fans have fallen down the rabbit hole of believing if we drop thats us done and dusted forever but the path to success isn't set in stone otherwise everyone would be using the same formula.
Hypothetically we could stay in the Prem for the next 5 years and be finishing 16th-17th every year avoiding the drop by the skin of our teeth and not progressing.
Whereas we could go down, drain the swamp, sign some of the young hungry players in the Championship and come up playing some good footie, recruit well with the promotion dough and be in Brentfords position.
Obviously it could go the opposite way and we stay down for a few years but a new 53k ground means eventually we'll be back as our revenues would drawf the teams in the division.
My point is dont get hung up on the PL status - Leicester were in the Fizzy pop league for years, came up then won the Title and FA Cup in which we've been in the league for much longer and done sod all. Newcastle & Villa both went down in recent years and have both overtaken us. Sunderland went into League One with worse finances than us and they're just outside the Play off spots in the Champo a season after coming up from League one.
Dont listen to Carragher/Nevilles Propaganda - the PL isnt the be all and end all like they'll have you believe. Burnley fans will likely be much more optimistic about their future this season watching them win every week playing good togger than they were losing every week and all the doom and gloom of the bestest league in the world last season.