Assuming you're thinking in terms of Australian companies (?) one point to consider is this.
We have to build
something or we'll be sitting in the dark.
That's by no means an overstatement of the situation for it's simply the reality that we're heavily dependent on plant that's now past its design life and time's running out. There's plenty on both "sides" of the debate all to aware of that reality. Plenty on the environmental side of the debate who've come to see the problem not as how to close coal but that it might close involuntarily before we've got a replacement. Plenty of engineers fretting about the same scenario.
Sunday 7th June 2020 at 13:33 and we have another incident with a major power station in NSW falling in a heap. All running OK then down we go, the whole station straight to zero and that's where it still is right now. I'm not aware of exactly what's happened but overall it's not really surprising since 1970's machinery's getting a bit tired and worn out these days so things will go wrong yes. The lights stayed on because load was taken up but other plant as far away as Adelaide and in Queensland.
Overall the situation varies between states but some serious building of new generating plant, using whatever technology and resources, is going to be required in some ares if Australia is to remain a developed country.
In NSW over 60% of total electricity supply on an annual basis is coming from facilities that'll be shut by the middle of next decade so there's plenty needing to be built indeed the first of the closures is only 2 years away.
Vic, SA and Qld also have significant reliance on plant that's coming to the end of its of technical lifespan. Part of the NT too, although the small scale there makes replacement somewhat more straightforward up there.
WA's in much better shape. Not without issues, but they've got plenty of modern plant overall.
Tas no real drama, just keep maintaining it all and it'll keep going, building things is more about supplying increased load (industry, electric cars, interstate) than any actual problem with what's already there.
As for what all that means with renewables, well I'll keep out of politics beyond noting that the answer to the question is to significant extent a political one. From a technical perspective it could be done with renewables no worries but then it could also be done with fossil fuels or if someone's keen nuclear.
So it's a political and economic question - but if nothing gets done then ultimately existing plant won't run forever no matter how much yelling and screaming anyone in a suit wants to do.