You are not likely shocked by the addition of the RF 35 F1.4 to this list. From Canon Japan (translated):
Apology and information regarding product supply status
Update date: June 11, 2024
Thank you for your continued patronage of Canon products.
Currently, we are experiencing delays in delivery for the following products due to orders exceeding our expectations and also due to the impact of global parts supply. We sincerely apologize to our customers and business partners for the inconvenience caused. We would like to apologize again for keeping our eagerly awaiting customers waiting for such a long time. We will continue to take measures to ensure a stable product supply so that we can deliver the products as soon as possible. We appreciate your understanding..
Product Name – About Supply
We plan to ship the products one by one, but delivery may take longer than usual.
We plan to ship the products one by one, but delivery may take longer than usual.
We plan to ship the products one by one, but it is expected that it will take a considerable amount of time for delivery. If you place a new order, it may take up to six months for delivery.
Note that B&H has a used Speedlight EL-1 in stock as I post this notice.