1000 angara? you are deluded.
Are you paying attention?
The Angara family is a family of modular rocket setups.
Instead of one type of rocket for small payloads, a different type of rocket for medium payloads and a further different type of rocket for heavy payloads you have one type of rocket for all payload weights.
The difference is one rocket for light loads three rockets for medium and 5-7 rockets for heavy payloads.
humans need supplies for living during space travel so ion engine is not option because of slow acceleration, except for robots for now.
Even for short range missions the steady acceleration of an ion engine makes things much more comfortable and reduces flight times.
With pure rocket power you endure high g for a few minutes and then coast all the way to the destination in zero g. that means fans on all the time to circulate the air... without those fans you would rapidly use up all the oxygen around you and suffocate in your own CO2. Equally things float and don't stay where you put them and your bones and muscles atrophy because you are not using them.
For a long range mission an ion engine would be vastly more effective... not just the advantages of even just a microgravity, but the enormous reduction in flight time with the constant acceleration and then deceleration.
well soyuz broke 1000 units in 2000-2 i think, but thats 35 years production run.
angara is bigger , more expencive and complex ,i dont think theyll make it in 1000s by 2050 but much latter.
Like I said above Angara will be the standard rocket system so previously when using a rocket you might use one Soyuz or you might use a Proton.
If you had 1,000 launches you might find 400 of those can be done with Soyuz... so you use 400 Soyuz rockets, but the remaining launches require more lifting power so they use Proton or something else.
With Angara if you have the same situation the 400 light launches you use 400 Angara rockets. For the 600 heavier launches however you might use the medium and heavy configuration Angara launchers... lets simplify and split them 50 50... 300 with 3 Angara rockets and 300 with 7.
That means for 1000 launches you use 400 Soyuz rockets or you use 400 + (300 x 3) + (300 x 7) Angara rockets. 400 Soyuz vs 3400 Angara rockets.
The Angara family might look like this:
A1, A3, A5, A7... the names of each rocket are a hint...
No argument here, it would take ion engine several weeks to build up speed that chemical rocket gets in one full burn. Ion engines are strictly for long term missions.
If they can be developed to the point where they can offer a decent sized space craft a third to a half g acceleration then almost any mission would benefit from their use.
They would also be very useful for any space station orbiter around earth or the moon to adjust height and speed.
But their greatest advantage at the moment is in long duration flights.