PayPal subscriptions vs. vaulting | WordPress.org

Hi all, as you mentioned in several other posts, there are now at least two different methods for subscriptions using PayPal, PayPal Vaulting (traditional option for automatic renewals) and PayPal Subscriptions (new feature that does not require Reference Transactions to be active on your account), see https://wordpress.org/support/topic/subscription-not-working-21/

As we have had severe problems with failing vaulting subscriptions for existing customers (see How to repair PayPal subscribers with missing token? https://wordpress.org/support/topic/how-to-repair-paypal-subscribers-with-missing-token/ ), I was wondering if that would be a better option. Is it correct that we currently have three different options?

• traditional vaulting with Vault 2.x
• traditional vaulting with Vault 3.x
• PayPal Subscriptions without Reference Transactions?

Is the latter one fully supported by the current WooCommerce PayPal Payments plugin, and is there a necessary or recommended migration for existing customers?