O/T:- ⚠️Impressed with the leadership [The UK Party Politics Thread]

[drillerpie]

Yeah, the two main parties would likely smash to smithereens pretty quickly. That'd be a positive thing!
You'd probably get a couple of decades of centrifugal fracturing before parties began to combine and consolidate again. For me though, it's firstly about guaranteeing a voice, platform and place for the radical ideas the country desperately needs. Suppression of alternatives is one of main aims/outcomes of the current Westminster, business and finance-based system.

It'd be quite unpredictable. Projecting outcomes is interesting, but that misses the point really. You change the voting system because it's the right and fair thing to do.

Imagine devising a political system for a new country from scratch. Erm...What shall we do...
A) Let everyone vote and then have a forum of representatives in proportion to that vote...or
B ) Have a vote and then give disproportionately high representation and unlimited power to one and zero to others...

Yes I completely agree that it's the right thing to because it's just a fairer system rather than because it might bring any particular outcome.

I think there would be continual splintering of parties, some amalgamation of parties, but more splintering than anything else, because of personal and policy disagreements.

In my subjective opinion this tends to affect left wing parties more as they are more likely to break up because they dogmatically follow their ideology while right wing parties tend to be more dogmatic.

A lot of these parties would then fall under the minimum for entering parliament which would be around 5% or so.

Like I said at the beginning I would definitely like to see it, just because I think it's fairer. It's certain that parties like the Greens would see a great benefit from it, but just remember that any country even at the best of times has at least a 5-10% of people willing to vote for a very far right (BNP style) party, and in these fractious times most Western countries with a PR system have strong or very strong far right parties (Le Pen, AfD, Salvini/Meloni, Vox). I don't see why we would be any different!

[the_anticlough]

In my subjective opinion this tends to affect left wing parties more as they are more likely to break up on points of principle while right wing parties tend to be more cynical.

Can't disagree with any of your post, apart from suggesting a rewording of your middle paragraph, hope you don't mind

A 5% threshold would hopefully instill some discipline and compromise.
Also, I'd like to think the left has grown out of the ridiculous splinter groups based on events in a far away country 100+ years ago...The People's Front of Judea type groups should be an irrelevance anyway. We'd have to see.

More ominous for the left might be disagreements around those liberal/cultural issues as you say. If those ever found expression in a political party, my guess would be that it wouldn't do well at all - that would then bust the myths that the likes of the Daily Mail pedal.