Need more than one SFP interface at the level of $100 and $200
In many scenarios where we provide solutions for users, ISPs selected by customers provide two links for customers to improve usability.
But apart from CCR products, Mikrotik products almost do not provide more than one SFP interface, such as the latest RB4011iGS + RM is almost perfect, except for only one SFP + interface.
It is hoped that Mikrotik will be able to provide at least two SFP/SFP+interface products at the level of $100 and $200.

CRS326
CRS112
CRS305

?

CRS326
CRS112
CRS305

?

Those are switches, not routers.

CRS326
CRS112
CRS305

?

Those are switches, not routers.

OP does not mention whether router or switch is needed, just that they want a cheap multi SFP unit.
Also CRS switches can route, maybe not a huge amount of traffic but can push over 100Mb with correct FT rules.

Add one SFP converter like this:
https://www.aliexpress.com/item/10-100- ... 99741.html

I agree, e.g HAPac2 with SFP but not at the price point of the old HAP AC.

RB1100AHx4 with 2-4 SFP slots would be very helpful.

Add one SFP converter like this:
https://www.aliexpress.com/item/10-100- ... 99741.html

We need multiple SFP interfaces to be able to pay real-time attention to the status of the lines.
We can send notifications to customers and corresponding ISPs directly through the monitoring platform, which can quickly troubleshoot.

Well at the moment it appears you only options are that, or a CCR.
I would not count on MikroTik developing a new product especially for your use case (two ISP via SFP but no money to spend on a CCR).
Usually that kind of configuration would be found in business use, and $500 for a router is not too much for most of them.

3 years ago I pointed MikroTik at a (IMHO much larger) market: to support VDSL.
There was a company that developed a VDSL module for SFP.
It could be used with a couple of MikroTik products, if only they would add some monitoring code to RouterOS to display the status of that kind of module.
(they already basically worked when plugged in, but you would be in the dark about things like the actually trained rate and the S/N ratio)

Nothing happened. Nothing. But there are hundreds of thousands of potential users.
Apparently that is not enough even for development of only software. Let alone for developing a new hardware product.
(remember I was not asking for a router model with VDSL modem onboard, as other companies offer. I understand that costs lots of money to develop!)