I'd guess they'd need to figure out whatever apple did with it's arm chips.
efficient use of many-cores and probably some fancy caching arrangement.

It'll may also be a matter of financing to be able to afford (compete with intel, apple, amd, nvidia) to book the most advanced manufacturing for decent sized batches of more complex chips.

Once they have proven reliable core/chip designs , supporting more products and a growing market share, I imagine more financing doors will open.

I'd guess risc-v is mostly financed by industry consortia maybe involving some governments so it might not be about investor finance, but these funders will want to see progress towards their goals. If most of them want replacements for embedded low power arm chips, that's what they're going to prioritise over consumer / powerful standalone workstations.