The UK's - Supermarket Sweep, it was great in its original run during 1993-2001, then there was the revival in 2007.
Anyway, the format(s) in both the original run and second revival remained consistent within the 30 minutes format, and the 2007 revival could've continued up until Dale Winton's death in 2018.
Also, whilst the 2007 revival didn't succeed like the original run, there was the third revival since 2020, a new presenter, but my only criticisms of the current revival are some of the silly pointless characters, Jennie McAlpine and how ultimately it hasn't stuck to the 30 minutes format like it always should have done, so nobody knows how long the current revival will last. Other gameshows have made similar mistakes too which they never learnt from with Catchphrase AND Family Fortunes also both going from the 30 minutes format to the 1 hour format.
Finally, the biggest concern with any tv show really is the format, getting the basics correct in that sense, modern day producers are clueless and don't stick to what made it work in the first place, the format(s) as they were and the number of episodes broadcast approximately in a series.
Anyway, the format(s) in both the original run and second revival remained consistent within the 30 minutes format, and the 2007 revival could've continued up until Dale Winton's death in 2018.
Also, whilst the 2007 revival didn't succeed like the original run, there was the third revival since 2020, a new presenter, but my only criticisms of the current revival are some of the silly pointless characters, Jennie McAlpine and how ultimately it hasn't stuck to the 30 minutes format like it always should have done, so nobody knows how long the current revival will last. Other gameshows have made similar mistakes too which they never learnt from with Catchphrase AND Family Fortunes also both going from the 30 minutes format to the 1 hour format.
Finally, the biggest concern with any tv show really is the format, getting the basics correct in that sense, modern day producers are clueless and don't stick to what made it work in the first place, the format(s) as they were and the number of episodes broadcast approximately in a series.