Literal quote from Nintendo President Furukawa, directly refuting your argument:
"President Furukawa said about the details of the Nintendo Switch successor, "There is no change in the plan to announce it during the fiscal year ending March 2025. I can't say anything more than that." Regarding potential hesitation to purchase the current model due to the announcement of a successor, he added, "I can't say it doesn't exist at all, but the Switch is already in its eighth year since launch. I don't think the presence or absence of a successor will have much impact on customers who are purchasing it at this timing."