Why choose 10? Because it suited your argument. You could have chosen 4 seasons. Or 15. But 10 suited you best.
Seriously let it go.
I chose 10 because I thought it a reasonable number.
I guess I could have chosen your 4, but that is being selective.
Parachute Payments were introduced in 2006-07, so been going 18 seasons.
So I will be exhaustive rather than selective. 18 seasons, 36 auto promoted, 18 Play off winners.
The Championship champions have been in receipt of PP's 10 times in those 18 seasons. 8 clubs were not (Leeds 20, , Wolves 18, Bournemouth 15, Leicester 14, Cardiff 13, Reading 12, QPR 11, Wolves 09).
The runner up had PP's 8 times. 10 clubs (Ipswich 24, Sheff U 19, Cardiff 18, Brighton 17, Boro 16, Watford 15, Burnley 14, Southampton 12, Norwich 11, Stoke 08) were not.
So since PP's were introduced, only 18 PP clubs have been automatically promoted. 18 were not in receipt of PP's.
Only 8 of the 18 Play off winners were in receipt of PP's. 10 clubs were not (Luton 23, Forest 22, Brentford 21, Huddersfield 17, Palace 13, Swansea 11, Blackpool 10, Burnley 09, Hull 08, Derby 07)
So only 26/54 promoted clubs since PP were introduced in 2006-07 were receiving PP's. Over 52% were not.
32 clubs have been promoted in those 18 seasons since PP were introduced.
Burnley, Norwich, Fulham, West Brom and Hull have been most active. Those 5 clubs have filled 17/54 promotion slots.
Newcastle, Birmingham, Bournemouth, Watford, Southampton, Leicester, QPR, Sheff U, Cardiff and Wolves have had a couple of promotions. Those 10 clubs filling 20/54 of the slots.
But there are still 17 other clubs who have been promoted.
4 Burnley have gone up 4 times; 2 with PP's, 2 without
4 Norwich have gone up 4 times: 3 with, 1 without.
3 Fulham and West Brom have each gone up 3 times with, 0 without
3 Hull have gone up 3 times: 2 with, 1 without.
2 Newcastle and Birmingham have each gone up 2 times: 2 with, 0 without
2 Bournemouth, Watford, Southampton, Leicester, QPR and Sheff U have each gone up 2 times: 1 with, 1 without.
2 Cardiff and Wolves have each gone up 2 times 0 with, 2 without.
1 Aston Villa, West Ham, Sunderland, have each gone up 1 time: 1 with, 0 without
1 Huddersfield,Middlesbrough, Ipswich, Luton, Forest, Brentford, Leeds, Brighton, Palace, Reading, Swansea, Blackpool, Stoke and Derby have all gone up 1 time: 0 with, 1 without