I tried to comprehend your answer, but I could not. Excuse me. Let's try to detail every aspect of this question.
1. Regarding Wordpress / Woocommerce Limits.
I studied this question and found the following information.
1.1. Woocommerce official position:
What is the maximum WooCommerce can handle?
Sky is the limit. We’ve seen instances of shops with 100,000+ products listed, handling thousands of transactions per minute. In those cases, they had great hosting support and their own developer team focused on optimization.
https://docs.woocommerce.com/document/woocommerce-scaling-faqs/
1.2. The results of testing the store with a large number of products:
General conclusion on “How many products can WooCommerce handle?”
In this research , we’ve tested the load speed of WooCommerce without the use of any cache plugins or custom hosting settings, which obviously influenced the results. In the following articles, we will explore the possibilities of caching and optimizing the store through hosting settings.
In general, it’s obvious that WooCommerce can cope with the large product bases and, if properly configured, can work with the bases of 50K, 100K or more products.
https://premmerce.com/many-products-can-woocommerce-handle/
This information leads us to conclude that Woocommerce can function normally with 50k-100k products.
2. Regarding Alidropship import / update limits
I think that the bottleneck of Wordpress (Woocommerce) / Alidropship interaction is not any Alidropship restrictions, but restrictions that Ali places on the number and duration of connections from one IP address.
Yaros tried to answer this question
here. According to this topic, it took 8 hours to upgrade 1,200 products. Assuming that Ali does not block the IP address from which updates are made, you can update 3600 products within 24 hours. This number could be used as a starting point to determine the maximum amount of product that can be updated from a single IP address per day..