It leads me to wonder. If it's all just an automated and finite offset, there's no reason for daylight savings policies to hew to 60 minutes adjustments.
Couldn't a nation decide to have a continuously changing offset throughout the year? It might make their offset lookup table substantially longer, but this could 'solve' daylight savings time It'd be adjusting all the time and you wouldn't notice, just you don't notice when leap seconds occur.
Those who rely on analog clocks might no longer adjust the same direction each time!