The Champions Cup final this weekend will lack a team from the Pro 12 for the fifth consecutive season following the Munster and Leinster semi-final defeats.
The tournament has become an Anglo-French production, although in those five years only four clubs have made it to the final: Toulon, Saracens, Clermont Auvergne and, last year, Racing 92, whose fall this season was emphasised by their recent 50-point defeat at Montpellier.
Gaps are all around. Saracens, pursued by Exeter, are well ahead of the rest in England where Wasps lead the table but will not emulate their achievements of the previous decade until they become harder to break down: they recorded bonus-point victories against the bottom two clubs in the league, Worcester and Bristol, in recent weeks but conceded seven.
Leinster and Munster are, following Ulster’s fickle season, the major forces in the Pro 12 and, while La Rochelle lead the Top 14 by a considerable distance, their failure to defeat Gloucester at home in their Challenge Cup semi-final suggested they will have it all to do win the play-offs where the more pragmatic Clermont, Montpellier and Toulon will be lurking.
There is a danger that some teams will outgrow the leagues they play in, which is one reason why Premiership Rugby, seeking to justify its intention to increase the length of the domestic season to 10 months from 2019-20, is looking to establish a tournament with the leading franchises in the southern hemisphere, which currently would mean four New Zealand sides.
With South Africa about to ditch two teams from Super Rugby next year, most likely the Cheetahs and the Kings, the prospect of their joining the Pro 12 has been raised. The organisers of the tournament are looking at ways to expand commercially to raise income for its sides, trying to keep up with the Premiership and the Pro 12, and even the United States has been explored.
As more money comes into the game, more is sought with most of the increase being absorbed in wages. Finance is the overriding reason why the Premiership wants to expand its season and, for all the assurances given to players about rest periods and a break at the midway point of a season, what about supporter fatigue and the extra costs fans face?
On the other hand Saracens can go no higher than they are in the current set-up. It is when the expansion of the club game cuts across Test rugby, the earner for the vast majority of tier one nations that the problems begin. That is not a concern for Premiership Rugby, which is why its ambitions should be challenged by the body that controls the game in England, the Rugby Football Union.