The main issue in places where I work would be that it totally eliminates options.

Under the old model:

- If the company moves away from a particular technology they can just keep an unsupported, but legal, license for the IDE in case they need to fix bugs, etc.

- If the company needs to improve cashflow it can defer upgrades

- If JetBrains goes out of business, you can keep using the IDE

- If JetBrains discontinues the product, you can keep using the IDE

- If JetBrains stops delivering worthwhile upgrades, you stop paying to upgrade.

- If JetBrains decides to unreasonably increase the upgrade price you stop paying. (edit: Added)

The benefits of the new model are:

- It's easier to account for the licensing cost as OpEx rather than CapEx, which matters to some businesses.

- It's easier to adjust your license costs in-line with your headcount. Hire some contractors? Add a couple of licenses. Downsizing that team? Drop some licenses.

Some organisations will consider that to be a beneficial trade-off, but many won't.