The so-called "no destruction, no establishment" principle, with continuous development, previously commonly used technologies may no longer be commonly used, and some features may be eliminated during major version updates. SRS's plan for eliminating features is:

1. First, mark it as Deprecated, not recommended for use, and describe in the Features and this issue why it is marked as Deprecated.
2. The Deprecated feature will still be maintained in a major version, for example, if HDS is Deprecated in SRS2, it will still be retained and maintained in SRS3, but will be removed in SRS4.

If users still need to continue using these Deprecated features, they can choose to:

1. Fork the SRS repository and revert the corresponding commit yourself. We will provide the commit to be deleted, and you just need to revert it in your own fork. However, future merges may cause potential issues that render it unusable.
2. Reply to this issue, explaining why you need to continue using this feature, describing your use case, and why other technical solutions cannot be chosen. If it is reasonable, we will consider maintaining the Deprecated feature.

Only by continuously subtracting can we do addition more easily.

TRANS_BY_GPT3